Question

if x^2 + 1/x^2 =47 then find the value of x^3 + 1/x^3

Answer 1

[ x + 1/x]² = x² + 1/x² + 2
= 49

so
[x+1/x] = 7

[x+1/x]³ = x³ + 1/x³ + 3(x+1/x)
343 = x³ + 1/x³ + 3×7

so
x³+1/x³ = 343 - 7
= 336

answer is
336

hope it helps you
@di

Answer 2

Hope this helps you the