calculate the gradient of the tangent to: y= f(x) =2x^2 +1 when x=1

Question

from the first priciples (using the definition of the gradient m of a curve at a given point)calculate the gradient of the tangent to: y= f(x) =2x^2 +1 when x=1

Answer 1

y=2x^2+1

dy/dx=4x

at x=1, slope=4