the question states

f(x)=(1/2) (a^x+a^-x) if a>0. If f(x+y)+f(x-y)=kf(x)f(y), where k is a constant find that constant k

:confused:

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- Dec 8th 2007, 12:47 PMakhayoonArbitrary powers
the question states

f(x)=(1/2) (a^x+a^-x) if a>0. If f(x+y)+f(x-y)=kf(x)f(y), where k is a constant find that constant k

:confused: - Dec 8th 2007, 01:01 PMJhevon
- Dec 8th 2007, 01:12 PMConstatine11
- Dec 8th 2007, 01:15 PMJhevon
- Dec 8th 2007, 02:05 PMThePerfectHacker
- Dec 8th 2007, 02:13 PMJhevon
- Dec 8th 2007, 02:20 PMThePerfectHacker
How about:

"And perhaps posterity shall thank me for having shown the Ancients did not know everything" (Fermat).

I am not exactly sure what I means, but it sounds like a King James type of quotation which are really eqoulently stated. I wish I could talk like that (in old English) but I am not so good.