Let X = {-1, 0, 1}, Y = {0, 2} and a function f : X → Y defiend by y = 2x4, is
A. one-one onto
B. one-one into
C. many-one onto
D. many-one into
Answer:C
Let X = {-1, 0, 1}, Y = {0, 2} and a function f : X → Y defiend by y = 2x4, is
A. one-one onto B. one-one into C. many-one onto D. many-one into