How do you find the area #y = f(x) = 4/x^2# , from 1 to 2 using ten approximating rectangles of equal widths and right endpoints?
See the explanation.
The bases of the rectangles are the subintervals:
The right endpoints are :
Use these to find the height of the rectangles:
So the areas of the rectangles are
# = (4/1.1^2+4/1.2^2 + * * * +4/1.9^2+4/2^2)Delta x#
# = (4/1.1^2+4/1.2^2 + * * * +4/1.9^2+4/2^2)(0.1)#
Now do the arithmetic.