If x 2 +1/x 2 =34, find x 3 +1/x 3 -9
Answers
Answered by
105
x² + 1/x² = 34
x + 1/x = √ (34 + 2) = 6
x³ + 1/x³ = (x + 1/x)^3 - 3 x/x (x + 1/x) = 6^3 - 3 * 6 = 198
answer: 189
x + 1/x = √ (34 + 2) = 6
x³ + 1/x³ = (x + 1/x)^3 - 3 x/x (x + 1/x) = 6^3 - 3 * 6 = 198
answer: 189
Answered by
56
x^2 +1/x^2 =34
x+1/x=√(34+2)
=6
x^3+1/x^3=(x+1/x)^3- 3x/(x+1/x)
=6^3-3×6
=189
.....hope it helps you all....
x+1/x=√(34+2)
=6
x^3+1/x^3=(x+1/x)^3- 3x/(x+1/x)
=6^3-3×6
=189
.....hope it helps you all....
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