Question:
Find the equation of the tangent to the curve $y=\sqrt{3 x-2}$ which is parallel to the line $4 x-2 y+5=0$.
Solution:
finding the slope of the tangent by differentiating the curve
$\frac{d y}{d x}=\frac{3}{2 \sqrt{3 x-2}}$
equation of tangent is given by $y-y_{1}=m(\operatorname{tangent})\left(x-x_{1}\right)$
now comparing the slope of a tangent with the given equation
$\mathrm{m}($ tangent $)=2$
$\frac{3}{2 \sqrt{3 x-2}}=2$
$\frac{9}{16}=3 x-2$
$x=\frac{41}{48}$
since this point lies on the curve, we can find $y$ by substituting $x$
$y=\sqrt{\frac{41}{16}-2}$
$y=\frac{3}{4}$
therefore, the equation of the tangent is
$y-\frac{3}{4}=2\left(x-\frac{41}{48}\right)$