Question

3x+3/x=2হলে x³+1/x³+2=কত হবে মান লাভ

Answer 1

given

$3x + \frac{3}{x} = 2 \\ x + \frac{1}{x} = \frac{2}{3}$

Now

${x}^{3} + \frac{1}{ {x}^{3} } + 2 \\ \\ = (x + \frac{1}{x} ) ^{3} - 3(x + \frac{1}{x} ) + 2 \\ \\ = ( { \frac{2}{3}) }^{3} - 3. \frac{2}{3} + 2 \\ \\ = \frac{8}{27}$