Medium
Let $f(x) = \sqrt{x - 1} + \sqrt{x + 24 - 10\sqrt{x - 1}}$ for $1 < x < 26$ be a real-valued function. Then $f'(x)$ for $1 < x < 26$ is
- A$0$
- B$\frac{1}{\sqrt{x - 1}}$
- C$2\sqrt{x - 1} - 5$
- DNone of these
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