Thursday, March 25, 2010
Emergency Plan Practice Session/HW 67
Hi guys,
For class work today, I want you to watch the above videos, covering section 4.5b over change of variables for definite integrals. Watch the video lesson and send me any questions via chat or the comment feature on the blog. HW for tonight is:
HW 67
Section 4.5 (pg. 304)
#'s 72-84 even, 88, 90
Thanks!
Mr. Joseph
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2 comments:
I'm having a lot of trouble with number 88...
i've changed the definite integral to fit with the u, but I'm not too sure what to do next. I've got: definite integral from 0-8 of: (u-2)^2 times (square root of u) times (du)
80 I also had some trouble with. I got to: (1/2) definite integral from 5-1 of ((u+1)/2)times(u^(-1/2)) times (du)
sorry if this looks confusing...
Thanks
All right, a comment!
For #80 if inside the integral you have
(u+1)
-----
u^(1/2)
You'll have to separate it and simplify:
u 1
------ + ------- =
u^(1/2) u^(1/2)
u^(1/2) + u^(-1/2)
then integrate...
Hope that helps.
#88 is similar but you'll have to expand and simplify.
Hope this helps!
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