The function f: R→R defined by f(x) = x^2 for x>0 and f(x) = 0 for x<0 having real number as their co-domain is |
one-one, onto one-one, into many-one, onto many-one, into |
many-one, into |
Its clear from the graph, that the given function is many one and into. Hence (4) is the correct answer. |