\( \int \sqrt{x^{2}-8 x+7} d x \) \( \mathrm{P} \) (1) \( \frac{x-4...

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\( \int \sqrt{x^{2}-8 x+7} d x \)
\( \mathrm{P} \)
(1) \( \frac{x-4}{2} \sqrt{x^{2}-8 x+7}-9 \log \mid x-4 \)
W
\[
\sqrt{x^{2}-8 x+7} \mid+C
\]
(2)
\[
\begin{aligned}
\frac{x-4}{2} \sqrt{x^{2}-8 x+7} & +\frac{9}{2} \log \mid x-4 \\
& +\sqrt{x^{2}-8 x+7} \mid+C
\end{aligned}
\]
(3)
\[
\begin{array}{l}
\frac{x-4}{2} \sqrt{x^{2}-8 x+7}-\frac{9}{2} \log \mid x-4 \\
+\sqrt{x^{2}-8 x+7} \mid+C
\end{array}
\]
(4) None of these
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