IIT JEE 1982 Maths - 'Adapted' - Subjective to Multi-Correct Q1

Calculus Level pending

Let f f be a one-one function with domain {x, y, z} and range {1, 2, 3}. It is given that exactly one of the following statements is true and the remaining two are false:

  • f ( x ) = 1 f(x)=1
  • f ( y ) 1 f(y)≠1
  • f ( z ) 2 f(z)≠2

Then which of the following is/are true about the function f 1 f^{-1} ?

  • (A) f 1 ( 1 ) = x f^{-1}(1)=x
  • (B) f 1 ( 2 ) = y f^{-1}(2)=y
  • (C) f 1 ( 3 ) = z f^{-1}(3)=z
  • (D) None of the others

Enter your answer as a 4 digit string of 1s and 9s - 1 for correct option, 9 for wrong. Eg. 1199 indicates A and B are correct, C and D are incorrect. None, one or all may also be correct.


In case you are preparing for IIT JEE, you may want to try IIT JEE 1982 Mathematics Archives


The answer is 9919.

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