Sets and Functions

The following table represents a function from A = {5, 6, 8, 10} to B = {19, 15, 9, 11} where

*f*(*x*) = 2*x*− 1. Find the values of*a*and*b*.x |
5 | 6 | 8 | 10 |

f(x) |
a |
11 | b |
19 |

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Tamil Nadu Board Paper 2017