Math  /  Calculus

QuestionMake the given substitution to evaluate the indefinite integral. 7(7x+14)4dx,u=7x+147(7x+14)4dx=\begin{array}{l} \int 7(7 x+14)^{4} d x, u=7 x+14 \\ \int 7(7 x+14)^{4} d x=\square \end{array}

Studdy Solution

STEP 1

1. We need to evaluate the indefinite integral using the given substitution.
2. The substitution u=7x+14 u = 7x + 14 will simplify the integration process.
3. We will use the method of substitution to solve the integral.

STEP 2

1. Perform the substitution u=7x+14 u = 7x + 14 .
2. Express dx dx in terms of du du .
3. Substitute into the integral.
4. Integrate with respect to u u .
5. Substitute back to express the result in terms of x x .

STEP 3

Perform the substitution u=7x+14 u = 7x + 14 .
Calculate the derivative of u u with respect to x x :
dudx=7 \frac{du}{dx} = 7
Thus, dx=du7 dx = \frac{du}{7} .

STEP 4

Substitute u=7x+14 u = 7x + 14 and dx=du7 dx = \frac{du}{7} into the integral:
7(7x+14)4dx=7u4du7 \int 7(7x+14)^4 \, dx = \int 7u^4 \cdot \frac{du}{7}
The 7 7 terms cancel out:
u4du \int u^4 \, du

STEP 5

Integrate with respect to u u :
u4du=u55+C \int u^4 \, du = \frac{u^5}{5} + C
where C C is the constant of integration.

STEP 6

Substitute back u=7x+14 u = 7x + 14 to express the result in terms of x x :
(7x+14)55+C \frac{(7x + 14)^5}{5} + C
Thus, the evaluated indefinite integral is:
(7x+14)55+C \boxed{\frac{(7x + 14)^5}{5} + C}

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