7. Let P And Q be points on the curve y=x^2+2x+5 at which x=2 and x=2+h respectively. Express the gradient of the line PQ in terms of h, and hence find the gradient of the tangent to the curve y=x^2+2x+5 at x=2.
Step-by-step solution-: Simplify the given expression for x=2: Simplify the given expression for x=2+h: Let be m a slope of …