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Question

The range of the function f(x)=7xPx3 is


A

{1,2,3}

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B

{1,2,3,4,5}

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C

{1,2,3,4}

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D

{1,2,3,4.5,6}

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Solution

The correct option is A

{1,2,3}


f(x) is defined when
x30x3,x37x2x103x5x=3 or 4 or 5
Range ={f(3),f(4),f(5)}={4P0,3P1,2P2}={1,3,2}


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