" If "f(x)=(a^(x)+a^(-x))/(2)" and "f(x+y)+f(x-y)=K(x)f(y)," then "K" is equal to "

If f(x)=(a^(x)+a^(-x))/(2) and f(x+y)+f(x-y)=kf(x)f(y) then k=

If f(x)=(a^(x))+a^(-x)/(2) and f(x+y) +f(x-y)=Kf(x) f(y) , then the value of K.

Given the function f(x)=(a^(x)+a^(-x))/(2)(a>0) If f(x+y)+f(x-y)=kf(x)*f(y) then k has the value equal to

If f(x)=(2^(x)+2^(-x))/(2) , then f(x+y).f(x-y) is equal to

If f(x) = (a^x + a^-x)/2, (a gt 2) then the value of f(x + y)+f(x - y) is equal to

If f(x+2y , x-2y)=x y , then f(x,y) equals

If f(x+2y , x-2y)=x y , then f(x,y) equals

If f(x+2y , x-2y)=x y , then f(x,y) equals

If f(x+2y , x-2y)=x y , then f(x,y) equals