Search 80,000+ tutors
Ask a question
0 0

Urgent! Calculus Help!

Tutors, please sign in to answer this question.

1 Answer

Break the interval 1≤x≤3 into 4 subintervals of length Δx=0.5, starting at 1, 1.5, 2, and 2.5. Find f(x)=x²-x+1 at these points:
f(1)=1,  f(1.5)=1.75,   f(2)=3,   f(2.5)=4.75.
Then the lower sum is
Notice how much the 4 rectangles underestimate the area under the graph, especially the rightmost one.