How to determine where a function has a horizontal tangent line?
Find the derivative f′(x). 2. Set f′(x)=0. 3. Solve for x.
How to find the average velocity of a particle given its position function s(t) over an interval [a,b]?
Calculate s(b) and s(a). 2. Apply the formula: b−as(b)−s(a). 3. Simplify to get the answer.
How to determine if a function is increasing or decreasing at a point?
Find the derivative f′(x). 2. Evaluate f′(x) at the point. 3. If f′(x)>0, increasing; if f′(x)<0, decreasing.
How to approximate the instantaneous rate of change using average rate of change?
Choose a small interval around the point. 2. Calculate the average rate of change over that interval. 3. This is an approximation of the instantaneous rate of change.
How to solve for the limit definition of a derivative?
Substitute the function into the limit definition. 2. Simplify the numerator. 3. Cancel out the h term in the denominator. 4. Evaluate the limit.
How to find the instantaneous velocity at t=1 if s(t)=t2+3t?
Find the derivative s′(t)=2t+3. 2. Substitute t=1 into s′(t). 3. s′(1)=2(1)+3=5.
How to find the average rate of change of f(x)=x2+1 from x = 0 to x = 2?