Question

X+1/X=3=then find the value of x^3+1/x^2=?

Answer 1

Step-by-step explanation:

$x {}^{3} + \frac{1}{x {}^{3} } = (x + \frac{1}{x}) {}^{3} - 3 \times x× \frac{1}{x}(x + \frac{1}{x} ) \\ = (3) {}^{3} - 3 \times 3 \\ = 27 - 9 \\ = 18$

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