The Definite Integral - Weebly
[Pages:22]The Definite Integral
Day 6 Motion Problems Strategies for Finding Total Area
ARRIVAL---HW Questions
Working in PODS
Additional Practice--Packet p. 13 and 14
?Make good use of your time! ?Practice makes perfect! ?Ask ME questions, ask your
CLASSMATES questions!
Area Problems
Review Problem ......
1. Set up an integral that represents the shaded region. 2. Evaluate the integral using the Fundamental Theorem of
Calculus THEN confirm your answer with " fnInt"
f (x) = x2
? 3 x2 dx = 9 0
Find the area of the shaded region
f (x) = x2
Discuss with your partner what we need to do to find the area of the shaded region.
Important to Remember: Integrals find area between the curve
and the x-axis.
27 - 9 = 18
Remember .....
? When evaluating integrals, "areas" beneath the x-axis are negative. ? When evaluating total area, all areas are positive.
a) Evaluate the integral 12
f (x)dx
0
f(x)
12
4
12
f (x)dx f (x)dx f (x)dx 3 7 4
0
0
4
4
12
a) Find the total area of the graph
12
4
12
f (x)dx f (x)dx f (x)dx
0
0
4
3 7 10
Practice--Find the area of the shaded region. NO CALCULATOR
YOU TRY!!
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