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Qn #1945
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If $f(x)$ is a polynomial satisfying $f(x)f\left(\frac{1}{x}\right)=f(x)+f\left(\frac{1}{x}\right)$ and $f(3)=28$, then $f(4)$ is
A.
$63$
B.
$65$
C.
$67$
D.
$68$
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❓ Question: If $f(x)$ is a polynomial satisfying $f(x)f\left(\... | TANCET Group Studies | Tancet Group Studies