if (x+(1/x))=4 then find value of (x^3+(1/x^3)) will mark you as brainlist if answer within 30 minutes
chammus:
r u sure
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I cannot get it
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Given, x+1/x=4
Now,
x^3+1/x^3
={(x+1/x)^3}-(3*x*1/x)(x+1/x) [by formula ]
=(4)^3-(3*4)
[since x+1/x=4]
=64-12
=52. (ans)
Now,
x^3+1/x^3
={(x+1/x)^3}-(3*x*1/x)(x+1/x) [by formula ]
=(4)^3-(3*4)
[since x+1/x=4]
=64-12
=52. (ans)
is it correct
Yes it is
how
By simple application of the formula a^3+b^3=(a+b)^3-3ab(a+b)
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