If-the-r-1-th-term-in-the-expansion-of-a-b-1-3-b-a-1-3-21-contains-a-and-b-to-one-and-the-same-power-then-the-value-of-r-is-

Question Number 63939 by gunawan last updated on 11/Jul/19

If the (r + 1) th term in the expansion of

{(\sqrt[3]{\frac{a}{\sqrt{b}}} + \sqrt{\frac{b}{\sqrt[3]{a}}})}^{21} contains a and b to

one and the same power, then the value

of r is