differentiation

Question: If $P=(1,\,1)$ , $Q=(3,\,2)$ and R is a point on x-axis then the value of $PR+RQ$ will be minimum at



1) $\left( \frac{5}{3},\,0 \right)$
2) $\left( \frac{1}{3},\,0 \right)$
3) (3, 0)
4) (1, 0)
Solution: Explanation: No Explanation
Maxima and Minima

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