Find the value of "f" on the top "9" and in the botton "1" x^2dx using four rectangles of equal width, with each left end-point used to find the height of each rectangle.
a) 2(1+9+25+49)
b) 2(9+25+49+81)
c) 0.5(1+9+25+49)
d) 0.5(9+25+49+81)
2 answers
please helppppp
You apparently want
∫[1,9] x^2 dx
using 4 rectangles of width 2, evaluating at the left sides.
You really need to study this some. Draw the graph and the rectangles; use various online Riemann Sum calculators, etc.
The 4 endpoints are obviously x=1,3,5,7. So, evaluate x^2 there to get the height of the rectangles.
Now, which of those sums seems likely to be the total area of the 4 rectangles?
∫[1,9] x^2 dx
using 4 rectangles of width 2, evaluating at the left sides.
You really need to study this some. Draw the graph and the rectangles; use various online Riemann Sum calculators, etc.
The 4 endpoints are obviously x=1,3,5,7. So, evaluate x^2 there to get the height of the rectangles.
Now, which of those sums seems likely to be the total area of the 4 rectangles?
1 answer