Find the formula and limit as requested.For the function f(x) = 9 - 3x2 , find a formula for the lower sum obtained by dividing the interval [0, 1] into n equal subintervals. Then take the limit as n?? to calculate the area under the curve over [0, 1].
A. 
; Area = 1
B. 9 - 
; Area = 8
C. 9 + 
; Area = 10
D. 9 - 
; Area = 8
Answer: B
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