SSC CGL 16 Aug 2015 Shift 1 Paper

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Question : 123 of 200

Marks: +1, -0

If x =

1/{√2+1}

then (x + 1) equals to

2
$√2$
$√2$ + 1
$√2$ - 1

Solution:

x =

1/{√2+1}

=

1/{√2+1}

×

{√2-1}/{√2-1}

=

{√2-1}/{2-1}

=

√2

- 1
∴ x + 1 =

√2

- 1 + 1
=

√2

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