Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\sqrt{x-1}-x-7$$

Evaluate

$-x+\sqrt{x-1}-7$

Differentiate w.r.t. x

$-1+\frac{1}{2\sqrt{x-1}}$

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