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please be patient. my computer is very slow with attachements
Lol I know. I am just saying okay :P .
I can't see 66 :( .
i just need 67-69
69 is still uploading. answer to 67 is 272 but i got 928....
#68. it's #67-69. I don't understand the reason for #69, but I know the answer. I know #67 is wrong, but I don't know why, and #68 is the same concept, so I don't know if I did that right either. Thank you!
Same concept or number 68.
where'd you get the powers from?
From my first step.
ok i think i get it now.
For number 69, we can''t integrate that function because it's impossible to make a number of rectangles in a vertical tangent line (You can't have 0 width for a rectangle).
At least that's my reasoning.
Sorry, my mistake those aren't powers.
@jennychan12 , do you get it or shall I explain more?
no it's good. oh, sorry. my mistake.
You are most welcome :) .