Let \( f(x)=\left\{\begin{array}{rc}1+\frac{2 x}{a}, & 0 \leq x1 \\ a x, & 1 \leq x2\end{array}\...
Let \( f(x)=\left\{\begin{array}{rc}1+\frac{2 x}{a}, & 0 \leq x1 \\ a x, & 1 \leq x2\end{array}\right. \), if \( \lim _{x \rightarrow 1} f(x) \) exists, then value of a is:
\( \mathrm{P} \)
(A) 1
(B) \( -1 \)
(C) 2
(D) - 2
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