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Question

If a function defined from A to B as follows


Then the correct options is/are

A
Image of 2 under f is 4
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B
Image of 5 under f is 10
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C
Preimage of 4 under f is 8
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D
Preimage of 6 under f is 3
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Solution

The correct options are
A Image of 2 under f is 4
B Image of 5 under f is 10
D Preimage of 6 under f is 3
Here, function is defined from A to B
f(1)=2
f(2)=4
f(3)=6
f(4)=8
f(5)=10

Image of 2 under f is 4
Image of 5 under f is 10
Preimage of 4 under f is 2
Preimage of 6 under f is 3

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