TS Police Constable Telugu Model Paper 2

Question : 67 of 200

Marks: +1, -0

a-b=1

మరియు

a^{3}-b^{3}=61

, అయిన

a b

విలువ ?

Solution:

a^{3}-b^{3}

= (a-b)^{3}+3 a b(a-b)

⇒61=1+3 a b× 1

⇒ 61-1=3 a b

a b=20

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