Let \( f: \mathbf{R} \rightarrow \mathbf{R} \) be defined by \( f(x)=\frac{x^{2}-8}{x^{2}+2} \),... VIDEO
Let \( f: \mathbf{R} \rightarrow \mathbf{R} \) be defined by \( f(x)=\frac{x^{2}-8}{x^{2}+2} \), then \( f \) is :
(A) one-one but not onto
(B) one-one and onto
(C) onto but not one-one
(D) neither one-one nor onto
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\[
f(x)=\left\{\begin{array}{rl}
\frac{x^{2}-4}{x-2}, & x \neq 2 ...