# math

Find the Riemann sum associated with
f(x)=4x^2+2, n=3 and the partition
xsub0=-2
xsub1=1
xsub2=2
xsub3=4
of [-2,4]
(a) when xsubk is the right end-point of [xsubk-1, xsubk] .

(b) when when xsubk is the mid-point of [xsubk-1, xsubk]

please help. i thought fora the anser was 216 but that's not right and i keep getting that answer so i must be doing something wrong. i thought u have to take the definate integral of the equation given from -2 to 4 and then multiply that by two..please tell me what i am doing wrong and what numbers to use for b...thank you!!

1. 👍
2. 👎
3. 👁

## Similar Questions

1. ### Calculus

Use midpoints to approximate the area under the curve (see link) on the interval [0,1] using 10 equal subdivisions. imagizer.imageshack.us/v2/800x600q90/707/5b9m.jpg 3.157---my answer (but I don't understand midpoints) 3.196 3.407

2. ### Math (combination/permutation)

Question 1: There are 12 students in a class. Find the number of ways that 12 studenets can take 3 different tests if 4 students are to take each test. Question 2 Find the number of ways 12 students can be partitioned into 3 teams

3. ### Calculus

9) The rectangles in the graph illustrate a left endpoint Riemann sum for f(x)=(x^2/8) on the interval [4,8]. What is the value of this left endpoint Riemann sum? The rectangles in the graph illustrate a right endpoint Riemann sum

4. ### calculus

Evaluate the Riemann sum for f(x) = 5 −1/2x, 2 ≤ x ≤ 14,with six subintervals, taking the sample points to be left endpoints. I don't understand is the answer 18?

1. ### Science

If 465 cm cube of sulphur(iv)oxide,can diffuse through porous partition in 30 seconds,how long will an equal volume , 620 cm cube of hydrogen sulphide take to diffuse through the same partition?(H=1, S=33, O=16)

2. ### Calculus

f is a differentiable function on the interval [0, 1] and g(x) = f(2x). The table below gives values of f '(x). What is the value of g '(0.1) x| .1 .2 .3 .4 .5 f'(x)| 1 2 3 -4 5 So I know f(x) would be the integral of f'(x) which

3. ### Calculus

Write the Riemann sum to find the area under the graph of the function f(x) = x4 from x = 5 to x = 7.

4. ### Math!

Consider the integral from 3 to 6 S(2x^2+4x+3)dx (a) Find the Riemann sum for this integral using right endpoints and n=3. (b) Find the Riemann sum for this same integral, using left endpoints and n=3.

Rocket A has a positive velocity v(t) after being launched upward from an initial height of 0 feet at t=0 seconds. The velocity of the rocket is recorded for certain values of t over the interval 0

2. ### Calculus

Values of f(x,y) are given in the table below. Let R be the rectangle 1≤x≤1.6, 2≤y≤3.2. Find a Riemann sum which is a reasonable estimate for ∫Rf(x,y)da with Δx=0.2 and Δy=0.4. Note that the values given in the table

3. ### Chemistry

If 465 cm³ of sulphur(IV)oxide,can be diffuse through porous partition in 30s how long will(a) an equal volume , (b)620cm³ of hydrogen sulphide take to diffuse through the same partition ?(H=1,S=32,O=16)

4. ### Calculus integrals

Find the value of the right-endpoint Riemann sum in terms of n f(x)=x^2 [0,2]