TS Police Constable Telugu Model Paper 7

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Question : 51 of 200

Marks: +1, -0

{a}{3}=1- {3}{a}

అయిన

a^{5}

విలువ

$-81$
$148$
$-243$
$227$

Solution:

a/3=1-3/a

⇒

a/3+3/a=1

{a^2+9}/{3a}=1

⇒

a^2+9=3a

⇒a^2-3a+9=0

⇒(a+3) (a^{2}-3 a+9)=0

⇒a^3+b^3=0

[∴(a+b)(a^2-ab+b^2)=a^3+b^3]

⇒a^3=(-3)^3∴a^5=(-3)^5=-243

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