Problem

The regions A,B,C,D, and E in the figure below are bounded by the graph of the function f and the x-axis. The areas of each enclosed region are labeled in the figure with their respective numerical values. What is the value of 23(f(x)+1)dx?

Answer

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Answer

23(f(x)+1)dx=9+5=14

Steps

Step 1 :23(f(x)+1)dx=23f(x)dx+231dx

Step 2 :23f(x)dx=(4+8+20)(1+2+15)=9

Step 3 :231dx=3(2)=5

Step 4 :23(f(x)+1)dx=9+5=14

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