TS Police Constable Telugu Model Paper 6

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Question : 64 of 200

Marks: +1, -0

A=1/{√6-√5}

అయిన

A^2+1/A^2

$4√30$
22
11
ఏదీకాదు

Solution:

A=1/{√6-√5}

=1/{√6-√5}×{√6+√5}/{√6+√5}

=√6+√5

మరియు

=1/A=√6+√5

∴A^2+1/A^2=(√6+√5)+(√6+√5)^2

⇒6+5+2√30+6+5-2√30

=22

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