If k > 0, then solve the inequation |x| ≤ K

Solve the equation \(\frac { x+2 }{ x+3 } =\frac { x+4 }{ 2x+3 } \)

If a³+ b³= ab(8 - 3a - 3b), show that log \(\left( \frac { a+b }{ 2 } \right) =\frac { 1 }{ 3 } \)  (log a + log b)

Solve \(\sqrt{x+5}\)

Resolve into partial function \(\frac{2}{x^2-1}\).