a+1/a=2 then value of a^3+1/a^3 wil bea
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a+1/a =2
cubing on both the sides
(a+1/a)^3 =2^3
a^3+(1/a)^3+3(a+1/a)=8
a^3+1/a^3 +3×2=8
a^3+1/a^3+6=8
a^3+1/a^3=8-6
a^3+1/a^3=2
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