SSC CGL 9 Aug 2015 Shift 2 Paper

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Question : 104 of 200

Marks: +1, -0

If x +

1/x

= 1 then the value of

{x^2++3x+1}/{x^2+7x+1}

is

1
$3/7$
$1/2$
2

Solution:

x +

1/x

= 1 (Given)
Expression =

{x^2++3x+1}/{x^2+7x+1}

=

{x+1/x+3}/{x+1/x+7}

(Dividing numerator and denominator by x)
=

{1+3}/{1+7}

=

4/8

=

1/2

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