1.

If the functions f satisfies the relation f(x+ y ) +f( x-y)= 2f ( x)f(y) AA x, yin R and f (0) ne 0 , then

Answer»

`F(x)` is an even FUNCTION
`f(x)` is an odd function
If `f(2)=a`, then `f(-2)=a`
If `f(4)=b`, then `f(-4)= - b`

Answer :A::C


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