AM-1780

Tangents and normals

A Math · Secondary 4 · Medium · Tangents and normals

The curve

y = \sqrt{2x+7}

passes through the point

P

where

x=2

. Find the equation of the normal to the curve at

P

.

$y-\sqrt{11}=-\sqrt{11}(x-2)$
$y-\sqrt{11}=\sqrt{11}(x-2)$
$y+\sqrt{11}=-\sqrt{11}(x-2)$
$y-2=-\sqrt{11}(x-\sqrt{11})$

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