Approximate the area under the graph of f(x) over the specified interval by dividing the interval into the indicated number of subintervals and using the left endpoint of each subinterval.f(x) = 0.5x4 + 0.1x3 + x2 - 1; interval [1, 4]; 3 subintervals
A. 63.6
B. 213.0
C. 69.6
D. 212.4
Answer: A
Mathematics
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