Find the slope of the tangent to the curve y=2√x at the point (1,2).
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Solution
y=2√x dydx=2(1(2√x))=1√x dydx is called slope of the tangent to the curve y=2√x at the point (x,y). For the point x=1 and y=2. Putting x=1 and y=2 in the equation dydx=1√x , we get dydx=1√1. Hence slope is 1.