If \( f: R \rightarrow R \) be given by \( f(x)=\frac{4^{x}}{4^{x}+2} \) for all \( x \in R \). ....

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If \( f: R \rightarrow R \) be given by \( f(x)=\frac{4^{x}}{4^{x}+2} \) for all \( x \in R \).
\( \mathrm{P} \)
Then,
(1) \( f(x)=f(1-x) \)
(2) \( f(x)+f(1-x)=0 \)
(3) \( f(x)+f(1-x)=1 \)
(4) \( f(10)+f(9)=1 \)


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