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Question

The sum of a number and its reciprocal is 17/4. The number is ____________.

A
5
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B
4
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C
6
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D
3
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Solution

The correct option is A 4
Let the number be x
Given Sum of a number and its reciprocal is 17/4
x+1x=174
x2+1x=174
4x2+4=17x
4x216xx+4=0
4x(x4)(x4)=0
(4x1)(x4)=0
x=14,4
So the number is 4

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