Given the function f(x) such that 2f(x)+xf(1x)−2f(∣√2sinπ(x+14)∣)=4cos2πx2+xcos(πx), then which one of the following is correct ?
If a function f:R→R be defined by f(x) =3x-2, x<0 1,x = 0 4x+1, x>0Find : f(1), f(-1), f(0), f(2)