MTH101 TMA1 Questions and Solutions : Let x be the required Geometric Mean (GM) between a and b. Then a, x, b, are the successive terms in the Geometric Progression. Find the GM

Let x be the required Geometric Mean (GM) between a and b. Then a, x, b, are the successive terms in the Geometric Progression. Find the GM
a) $\frac{ab} {x}$
b) x{ab}
c) $\sqrt{axb}$
d) $\sqrt{ab}$