good one

given:
f(x) + f(1/x)=f(x)*f(1/x);

f(4)=17;

question:find f(7)?

4 Answers

11
Mani Pal Singh ·

THESE FUNCTIONS ARE OF THE TYPE
XN+-1
HERE PUT X=7
THE ANSWER IS 50

1
chemistry organic ·

thanx dude

1
chemistry organic ·

can u prove that its of that type only....any algebraic proof.(not necessary)

341
Hari Shankar ·

http://targetiit.com/iit_jee_forum/posts/to_santom_p_828.html

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