If `f(y)={(((e^(2y)-1)*siny)/(y^(2)),", for "y ne 0),(4,", for "y=0):}`, then f(y) is

If {:(f(y),=y^(2)-y-1,",", "for"0 le y lt 2),(,=4y+1,",","for"2 le y le 4):} , then

If {:(f(y),=y^(2)-y-1,",", "for"0 le y lt 2),(,=4y+1,",","for"2 le y le 4):} , then

Let f be a differential function satisfying the condition. f((x)/(y))=(f(x))/(f(y))"for all "x,y ( ne 0) in R"and f(y) ne 0 If f'(1)=2 , then f'(x) is equal to

Let f be a differential function satisfying the condition. f((x)/(y))=(f(x))/(f(y))"for all "x,y ( ne 0) in R"and f(y) ne 0 If f'(1)=2 , then f'(x) is equal to

f(x+(1)/(y))+f(x-(1)/(y))=2f(x)*f((1)/(y)) for all xy in R-{0} and f(0)=(1)/(2), then f(4) is

If f(y)=(y+1)/(y+2) , then find f(0) + f(-1).