I78] let f : r> r be a function defined by el-e f(a)= then then f is e+e- (a one-one and onto (b) one-one but not onto (c) onto but not one-one (d) neither onto

i78] Let f : R> R be a function defined by el-e f(a)= then then f is e+e- (a one-one and onto (b) one-one but not onto (C) onto but not one-one (d) neither onto nor one-one