how to show this:(adsbygoogle = window.adsbygoogle || []).push({});

if f(x) = 2x/(2x-1)

then show f(n) + f(n)f(n-1) + f(n)f(n-1)f(n-2) + ... + f(n)f(n-1)f(n-2)...f(1) = 2n .

I have tried to use induction , and I can show it.

but , I can't show it without using induction.

can anyone tell how to show it without using induction?

thank you !

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# Show it without using induction?

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