If `y = f(x)` and `y^(4) - 4y + x = 0`. If `f (-8) = 2`, then the value of `|28 f' (- 8)|` is

If f(x + y) = f(x) +f(y), then the value of f(0)

If f(2x + 3y, 2x-3y)=4xy , then find the value of f(x,y)

If f(x+y) = f(x) f(y) for all x,y and if f(5) = 2 and f(0) = 3, then what is the value of f '(5)?

If 2f(x+y)=f(x).f(y) for all real x, y. where f'(0)=3 and f(4)=25 , then the value of f'(4) is equal to

For all real x and y, f(x + y) = f(x)f(y), if f(4) = 4 and f'(0) = 3 then find the value of f'(4).

If for all values of x and y , f(x+y) =f(x) f(y) and f(5) =2, f'(0)=3, then the value of f'(5) is-

Let X be the set of all positive integers greater than or equal to 8 and let f:X rarr X be a function such that f(x+y)=f(xy) for a>=4,y>=4, If f(8)=8, then the value of f(20) is

If f(2(x)/(y))=f(2x)-f(y) for all x,y>0 and f(3)=2, then the value of [f(7)], is

If f (x + y) = f(x) + 2y^(2) + kxy and f(a) = 2, f(b) = 8, then f(x) is of the form

If y=f(x)=3x^2+2x+4 , then value of y at x=f(2) will be