X and Y are two sets and f:X→ Y .If f(c)={y; c is subset ofX , y is subset of Y} and f-1(d) = {x;d is subset of Y,x is subset of X}, then the true statement isA) f(f-1(b)) = bB) f(f-1(b)) = b,b is subset of YC) f-1(f(a)) = aD) f-1(f(a)) = a,a is subset of X

raman malik , 15 Years ago

Grade 12