Solve the value of (x3-1/x3),if x2+1/x2=82/9
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Posted by Smaty Nickke Singh 7 years, 9 months ago
- 2 answers
Payal Singh 7 years, 9 months ago
Given : x2+1x2=829
To find : x3−1x3
Solution:
We know,
(x−1x)2=x2+1x2−2
=>(x−1x)2=829−2
=>(x−1x)2=649
=>(x−1x)=83
Also,
=>(x3−1x3)=(x−1x)(x2+1x2+1)
=>(x3−1x3)=(83)(829+1)
=>(x3−1x3)=(83)(919)
=>(x3−1x3)=72827
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Rashika Soni 7 years, 9 months ago
0Thank You