Questionاجتماع لترشيج لنادي الشطرنج Forms - Google Drive Google Translate Translate Micrometer Instructional Techno... ChatGPT C.E 123 مكهبة - Goo.. Dashboard | Pre (b) 1 (c) 2 (d) 3. (11) Which of the following is a subspace of $P_{3}$ ? (a) $S=\left\{p \in P_{3}: p(1)=1\right\} \times$ $a x^{2}+b x+c$ (b) $S=\left\{p \in P_{3}: p(1)=0\right\}$ $$a+b+c$$ (c) $\beta=\left\{p \in P_{3}: p(0)=1\right\} \times$ (少) $S=\left\{p \in P_{3}: p(x)=x^{2}+a x+b, a, b \in \mathbb{R}\right\}$ (12) If the reduced row echelon form of $A$ is $\left[\begin{array}{lll}1 & 2 & 2 \\ 0 & 0 & 0\end{array}\right]$ and $a_{2}=(2,2)^{T}$, (a) $\left[\begin{array}{lll}1 & 2 & 2 \\ 1 & 2 & 1\end{array}\right]$ (b) $\left[\begin{array}{lll}1 & 2 & 2 \\ 0 & 2 & 0\end{array}\right]$ $$\begin{array}{lll} 2 & 4 & 4 \\ 2 & 4 & 1 \end{array}$$ (c) $\left[\begin{array}{lll}1 & 2 & 2 \\ 1 & 2 & 2\end{array}\right]$ (d) $\left[\begin{array}{lll}4 & 2 & 2 \\ 4 & 2 & 2\end{array}\right]$. Search