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anonymous
 one year ago
Write the summation to estimate the area under the curve y = 2x2 + 1 from x = 0 to x = 4 using 4 rectangles and left endpoints.
anonymous
 one year ago
Write the summation to estimate the area under the curve y = 2x2 + 1 from x = 0 to x = 4 using 4 rectangles and left endpoints.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0https://gyazo.com/10fefff1c824a71908fefa15fce74b76 It's A, right? Just making sure I got the right answer, haven't don math in quite some time.

dinamix
 one year ago
Best ResponseYou've already chosen the best response.0yup its great mate @Ephemera

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1@dinamix this is once again why just giving answers can be bad, you don't know the answer is wrong that you gave...

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1@Ephemera would you like to learn how to do this?

dinamix
 one year ago
Best ResponseYou've already chosen the best response.0lol @zzr0ck3r he tell me do that

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1remember we don't start at the beginning of the interval, which here you chose 0. If we put it into 4 parts, from 0 to 4, we would use the interval [0,1], [1,2], [2,3], and [3,4]. When we take the width of the first interval, we have 1, so we start at 1 not 0. So what is the right answer?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It would be D, right?

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1remember last time, \(x_1=4.5\) not \(4\) even though we were on the interval \([4,6]\).

dinamix
 one year ago
Best ResponseYou've already chosen the best response.0\[\sum_{i=1}^{4}(2i^2+1) = 3+9+19+33\] @Ephemera i think should be like that

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So if it was for example 3 to 5, I'd divide it into 3,3.5,4,4.5?

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1once again, @dinamix just giving the answer would not help really, with logic and reasoning you can lead them to the correct answer.

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1@Ephemera yes, if they said 4 intervals

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1well no, it would be 3.5, 4, 4.5, 5

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1this is assuming they want right triangles, which is pretty normal

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1but the intervals would be [3,3.5], [3.5,4], [4,4.5], [4.5, 5]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok, think I got it I reset my exam because I got a low grade on the last....can you check over my work @zzr0ck3r?

dinamix
 one year ago
Best ResponseYou've already chosen the best response.0@zzr0ck3r wow u are good teacher i like u ;)

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1Just post questions as you have them, I am not sure how ethical that is...
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