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Question

Let A={5,6,7,8},B={11,4,7,10,7,9,13}, and f={(x,y):y=32x,xA,yB}. What is the range of f?

A
{7,7,10,13}
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B
{7,9,10,11}
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C
{7,9,11,13}
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D
{7,9,11,13}
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Solution

The correct option is D {7,9,11,13}
Given: y=32x

When x=5,

y=32(5)=310=7

When x=6,

y=32(6)=312=9

When x=7,

y=32(7)=314=11

When x=8,

y=32(8)=316=13

Range of f={7,9,11,13}

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