Question Id : 17974 |
Context : JEE Main 2026 (22 January Evening Shift)
Let the domain of the function $f(x)=\log_3\log_5\left(7-\log_2(x^2-10x+85)\right)+\sin^{-1}\left(\left|\dfrac{3x-7}{17-x}\right|\right)$ be $(\alpha,\beta]$. Then $\alpha+\beta$ is equal to :
🎥 Video solution / Text Solution of this question is given below:
For $\log_3\log_5(7-\log_2(\cdots))$ to exist, we need $\log_5(7-\log_2(x^2-10x+85))>0$, so $7-\log_2(x^2-10x+85)>1$. Thus $\log_2(x^2-10x+85)<6\Rightarrow x^2-10x+21<0\Rightarrow 3