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Question

The sum of all the real values of x satisfying the equation 2(x1)(x2+5x50)=1 is.

A
5
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B
16
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C
14
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D
4
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Solution

The correct option is C 4
For 2(x1)(x2+5x50)=1

(x1)(x2+5x50)=0

x1=0 or x2+5x50=0

If x1=0x=1

If x2+5x50=0, then

x2+10x5x50=0

x(x+10)5(x+10)=0

(x+10)(x5)=0

x=10,5

Real values of x=10,1,5

sum of the real values of x=10+5+1=4.

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