TS Police Constable Telugu Model Paper 10

Question : 64 of 200

Marks: +1, -0

(x-5)^3+(x-6)^3+(x-7)^3=3(x-5)(x-6)(x-7)

అయిన x ఎంత?

Solution:

a^3+b^3+c^3=3 a b c

∴a+b+c=0

∴x-5+x-6+x-7=0

3 x-18=0

3 x=18

x=6

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