Solve the system using Gaussian elimination and backward substitution. Find the ordered triple for x, y, z: x+2y+4z=−x+3y+4z=x+y−5z=148−20 Choose A, B, or C based on the solution type.
Step 1: Subtract the exponents of powers with like bases.
(2x6y)−2 Step 2: Apply the power of a product rule.
2−2x−12y−2 Step 3: Write negative exponents as reciprocals using positive exponents.
22x12y21 Step 4: Evaluate the power with the integer base.
4x12y21 In which step did Loi make the first error?
Order of Operations: Exercise 2
Grace Date:
Girace
Answer these questions in your notebook. Set up each question properly and show all work clearly. 1. 82−33+4×7−(6−(−2)×(−4)÷8×31−1)÷8−30÷(−6))−25 2. (−1)84÷5×5+694÷(7−16÷2)694+(−3×(−8)−24)×13÷89+6−19 3. 77×8÷77×[16+(7×2÷7×2)−16+4] 4. 98−(−77)÷(−7)+8−(6−3×4)+(6+(−2)−(−5)+3−2)(8−(−6)×3) 5. (5−9+3)(−15÷8×2÷3×4+4)(1÷8×(−8))(6×5−5)(3÷9×9−(−2))(−4) 6. 2369×125÷23×(−4)÷(−1)×2−(25×91×(−4)÷(−7)×(−3)+(−12)) 7. 1÷22÷11×121×(−6)−2(36÷(−33)×(−11)÷4)÷(7−(−2)(−5))−(−7)−5 8. −60×85÷3÷(−85)×1443÷481×(25−4×4)−(1−6)+5−7 9. 5×4×3×2×1−0÷16×27+(−17−3÷12×(−2)÷(−1)×(−2)+5)×(−7−(−5))−3(8−19+2)−(−2−1) 10. 3(9+6−9+6)−(−8)÷(−5)×(−7×(−6)−(−6)×(−4)+7)−(−1136)−1139 11. −9−(−12−16)×42÷(−8)÷(−7)−(8−10)(−3+3)÷97×563−(−13)+2×4 12. 1÷(−5)×3×10−4(12−(−6)×(−2))÷7×(−3)+3÷9×(9−3×2) 13. −8×37×(−5)×25−5×17×(−5)×4×3×5×(−2)−(−12)÷3−(−1) 14. (−2−7×5)(5−3×2)+(−5+3×(−2))×(−16)÷(−2)+(2−7)(−6+(−5)÷(−5))+(3×(−5)−2×2)(−24÷28×(−14)÷6)−(−3)×(−2) 15. (−3)3−(−2)2÷7×(−3)×14÷(−2)−(−3)×(−2−32×(−2)−6)76×(−1)181×(−2)3
Use the Quadratic Formula to solve the equation x2−8x+61=0x=□ (Separate answers by a comma. Write answers as integers or reduced fractions.) If the answer is radical use sqrt(5) to denote 5 (use the correct radicand in the problem!) If the answer is complex use i to denote i.
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How could you correctly rewrite the equation 4(5+3)=2(22−6) using the distributive property?
20+12=44−12
78. If f(x)=ln(x) and g is a differentiable function with domain x>0 such that limx→∞g(x)=∞ and g′ has a horizontal asymptote at y=4 then limx→∞g(x)f(x) is
A. 0
B. -4
C. 4
D. nonexistent
Find the horizontal asymptote, if any, of the graph of the rational function.
h(x)=5x2+811x3 Select the correct choice below and, if necessary, fill in the answer box to complete your choi
A. The horizontal asymptote is □ . (Type an equation.)
B. There is no horizontal asymptote.
Find the horizontal asymptote, if any, of the graph of the rational function.
f(x)=5x+4−6x+7 Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The horizontal asymptote is □ .
(Type an equation. Simplify your answer. Use integers or fractions for any numbers in the equation.)
B. There is no horizontal asymptote.
90. What is the absolute minimum value of y=34x3−8x2+15x on 1≤x≤3 ?
A. 0
f(x)1=4x2−16x+15
B. 325
C. 9
f(1)=3251(3)=94x2−10x−6x+152x(2x−5)−3(2x−5)
D. 352f(3)=9f∣5)=3252x(2x−5)−3(2x−5(2x−3)(2x−5)
Does the equation below represent a relation, a function, both a relation and a function, or neither a relation nor a function?
y=9x2−9x+20
A. both a relation and a function
B. function only
C. relation only
D. neither a relation nor a function
Find an equation for a sinusoidal function that has period 2π, amplitude 2 , and contains the point ( 2π,0 ). Write your answer in the form f(x)=Asin(Bx+C)+D, where A,B,C, and D are real numbers.
f(x)=□
Let f be a twice-differentiable function such that f′(1)=0. The second derivative of f is given by f′′(x)=x2cos(x2+π) for −1≤x≤3.
(a) On what open intervals contained in −1<x<3 is the graph of f concave up? Give a reason for your answer. No response entered
(b) Does f have a relative minimum, a relative maximum, or neither at x=1 ? Justify your answer. No response entered
(c) Use the Mean Value Theorem on the closed interval [−1,1] to show that f′(−1) cannot equal 2.5. No response entered
(d) Does the graph of f have a point of inflection at x=0 ? Give a reason for your answer.
A particle moves along the x-axis so that its position at time t>0 is given by x(t)=3t2+8t2−9.
(a) Show that the velocity of the particle at time t is given by v(t)=(3t2+8)270t. No response entered
(b) Is the particle moving toward the origin or away from the origin at time t=2 ? Give a reason for your answer. No response entered
(c) The acceleration of the particle is given by a(t). Write an expression for a(t), and find the value of a(2). No response entered
(d) What position does the particle approach as t approaches infinity?
Consider the curve given by the equation (2y+1)3−24x=−3.
(a) Show that dxdy=(2y+1)24. No response entered
(b) Write an equation for the line tangent to the curve at the point (−1,−2). No response entered
(c) Evaluate dx2d2y at the point (−1,−2). No response entered
(d) The point (61,0) is on the curve. Find the value of (y−1)′(0).
(3) 55∘F
Use logarithmic differentiation to differentiate each function with respect to x. You do not need to simplify or substitute for y.
y=(2x4−1)5⋅(4x9+5)6(x2+4)3
A) dxdy=y(x2+46x−2x4−1160x3−4x9+5864x8)
B) dxdy=y(x2+418x−2x4−180x3+4x9+5432x8)
C) dxdy=y(x2+46x−2x4−140x3+4x9+5864x8)
D) dxdy=y(x2+46x−2x4−140x3−4x9+5216x8)
[4] If A−1=[3−121] and B−1=[1−3−14], and (AB)−1=[xyzh], then x+y+z+h
a) -10
b) 3
c) 8
d) 20
[5] If ∣∣aeimbfjncgkodhlp∣∣=−3, then det⎝⎛2⎣⎡aeimbfjncgkodhlp⎦⎤⎠⎞=
a) -6
b) -48
c) -12
d) -32
[6] The linear system given by AX=B where A is 2×2 square matrix, Ax=[26−11] and Ay=[3126], then X=
a) [24]
b) [−24]
c) [42]
d) [−4−2] Q2: Write (T) for the correct statement and (F) for the false one
[1] If ∣A∣=∣∣A−1∣∣ then ∣A∣ must equal to 1.
[2] If A=[−2] then A−1=[−22]
[3] 3ATA is a symmetric matrix.
[4] The matrix A=⎣⎡10005−200−30−100802⎦⎤ is singular.
Let g be the function defined by g(x)=(x2−x+1)ex. What is the absolute maximum value of g on the interval [−4,1]?
(A) 1
(B) e
(C) e3
(D) e121
https://apclassroom.collegeboard.org/25/assessments/results/62905152/performance/591...
Find the derivative.
y=e6x+7ln(6x+7) Select one:
A. ln[6x+7]e(6x+7)1−6[ln(6x+7)]2
B. (6x+7)e(6x+7)1
C. (6x+7)e(6x+7)6−(36x+42)ln(6x+7)
D. (6x+7)e(6x+7)1−(6x+7)ln(6x+7)
23-28 True-False Determine whether tr - statement is true or false. Explain your answer. 23. If f(x) is continuous at x=c, then so is ∣f(x)∣. 24. If ∣f(x)∣ is continuous at x=c, then so is f(x). 25. If f and g are discontinuous at x=c, then so is f+g. 26. If f and g are discontinuous at x=c, then so is fg.
Rational Functions, Equations, and Inequalities NAME Williams 0. DATE :
181
1212024
K 1/16
T
15
c
14
A
112
1) For each function, identify the location of the hole (if applicable), the equation(s) of the vertical asymptote(s) and the equation of the horizontal asymptote.
(a) f(x)=x2+xx+1
(b) g(x)=x2−4x2+4x+4
[K-6]
Exercice 4
Soit la suite (Un) définiepar {U0=32Un+1=21Un+22n+21 1. Calculer U1,U2 et U3 2. On pose: ∀n≥0Vn=Un2−n.
a. Calculer V0,V1 et V2
b. Montrer que (Vn) est une suite géométrique
c. Exprimer Vn puis Un en fonction de n
d. Calculer en fonction de n:Sn=∑k=0k=nvk
A.
B.
C. x≤−3 and x≥5
D. x<−3 and x>5
F. (−∞,−3]∪[5,∞)
E. R
G. (−∞,−3)∪(5,∞)
H. All real numbers
I. No solutions The questions in this level are taken directly from the Units 3 and 4
Review in "Activity: Review by Unit." Only proceed if you have completed that section of the activity. Solve the compound inequality 4x+1≤−11 and −3x+1<−14. Which of the options shown accurately represent(s) the solutions?
Unanswered Question 11
Not yet graded / 1 pts Evaluate the following improper integral if it is convergent. If it is not convergent, write divergent ∫0∞e−2xdx Your Answer:
Derivatives of Inverse Trig Functions
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Watch Video If f(x)=sin−1(x), then what is the value of f′(54) in simplest form? Answer Attempt 1 out of 5
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5. Which equation is linear? 4. xy=60
b. 3x−2y=52y−x2−3x+1 16. State whether each graph has line symmetry any lines of symmetry of points of symmetry.
a. point symmetry; (0,0)
coint symmetry; (−2,
b. (ine symertry; x=−2
a. line symmetry; y=1
Choose the correct answer :
(5 points)
1) A particular solution for the differential equation y(4)+y(3)=2+4ex is
(a) A+Bex
(b) A+Bx+Cx2+Dex
(c) Ax2+Bx2ex
(d) Ax2+Bex
e)NOTA
2) The solution for the I.V.P sin(t)y′′′+t−31y′′+ety=t3y(1)=0y′(1)=1y′′(1)=−1 is guaranteed on
a) (0,3)
b) (0,π)
c) (−∞,3)
d) (−∞,∞)
3) If a series solution is to be found for y′′−4xy′+4y=0,y(0)=2,y′(0)=3 then a2=
(a) -4
(b) 8
(c) -8
(d) 1
e)NOTA
4)Suppose the solution to the differential equation y′′+3y=0 is written as a power series y=∑n=0∞anxn What is the lower bound of the radius of convergence of this power series?
a) 0
b)1
c)2
d) 3
e) ∞
5) The general solution for y′′′+9y′=0 is :
a) c1+c2cost+c3sint
b) c1+c2t+c3e9t
c) c1+c2e3t+c3e−3t
d) c1+c2e3t+c3te3t
e)NOTA
false:
(5 points)
form of yp for y′′′−3y′+2y=xex is (Ax3+Bx2)ex
the roots of the indicial equation are −0.3,1.7 then the D.E. has two nearly independent solutions
W(f,g,h)=sint then the functions f,g,h are linearly dependent
er bound for the radius of convergence for the series 1 of (1−x3)y′′+4xy′+y=0,x0=3 is 2
=1 is a R.S.P for (x−1)2y′′+3y′+(x−1)y=0
ue or false:
(5 points)
- The form of yp for y′′′−3y′+2y=xex is (Ax3+Bx2)ex
- If the roots of the indicial equation are −0.3,1.7 then the D.E. has two linearly independent solutions
- If W(f,g,h)=sint then the functions f,g,h are linearly dependent
lower bound for the radius of convergence for the series lution of (1−x3)y′′+4xy′+y=0,x0=3 is 2
- x=1 is a R.S.P for (x−1)2y′′+3y′+(x−1)y=0
Q1) True or false:
(5 points) 1- The form of yp for y′′′−3y′+2y=xex is (Ax3+Bx2)ex
2- If the roots of the indicial equation are −0.3,1.7 then the D.E. has two linearly independent solutions 3- If W(f,g,h)=sint then the functions f,g,h are linearly dependent
4- The lower bound for the radius of convergence for the series solution of (1−x3)y′′+4xy′+y=0,x0=3 is 2 5- x=1 is a R.S.P for (x−1)2y′′+3y′+(x−1)y=0