Question

If $f(x) =\begin{cases}\frac{(72)^x - 9^x -8^x+1}{\sqrt2-\sqrt{1+cosx}} &; x ≠0\\\a\,log2\,log3 & ; x=0\end{cases}$ is continuous at x = 0. Then $a^2$ equals to

• A. 1152
• B. 572
• C. 1225
• D. 1005

Answer 1

Answer: (A)

1152

Answer 2

The Correct answer is option(A) : 1152