- #1

- 4

- 0

f(x+y) + f(x-y) =2f(x)f(y)

and f(0)=k

then find f(x)?

What should be approach followed to solve this question .

plz ans it soon

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- Thread starter succhi
- Start date

- #1

- 4

- 0

f(x+y) + f(x-y) =2f(x)f(y)

and f(0)=k

then find f(x)?

What should be approach followed to solve this question .

plz ans it soon

- #2

CompuChip

Science Advisor

Homework Helper

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One more hint: that identity holds for all values of y.

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