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Vijay posted an Question
October 06, 2020 • 23:11 pm 30 points
  • IIT JAM
  • Mathematics (MA)

F and g are one-one and onto, then gof is : (a) only one-one (b) only onto (c)one-one and onto (d) none of these.

f and g are one-one and onto, then gof is : (a) only one-one (b) only onto (c)one-one and onto (d) None of these.

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    Jagat Chaudhary best-answer

    If f and g are two bijections; then gof is a bijection and (gof)−1=f−1og−1

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    Deepak singh 1

    option c is correct composition of 1-1 onto function is 1-1, onto. if any doubt then ask

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