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AP / AB Calculus Test - Sample Questions 17 & 18

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Uploaded by on Feb 17, 2009

AP / AB Calculus Test - Sample Questions 17 & 18 worked out in detail! For more free math videos, visit http://JustMathTutoring.com

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Uploader Comments (patrickJMT)

  • you probably get this a lot but you're freakin' smart!

  • @reighteeen i am probably not the mostest stupidest person in the wurld at least

  • how do you know when you have to do U substitution

  • that is the hard part about integration, it is sometimes not obvious what to do.

    if i see something that is the derivative of something else (in the integrand), then u sub often is the trick to use

  • I've known how to do this, but after watching something hit me: It's best to change the limits to U-limits as well and not to resub back in for u and use the original limits. But what about the original 1/(b-a) in the beginning? Should those also have to be changed?

  • you say:

    It's best to change the limits to U-limits as well and not to resub back in for u and use the original limits

    that is up for debate i think! it is all the same to me...

    however, it is notationally incorrect to do a u-sub and use the original limits; it is just not right anymore! you can always revert back to the original limits.

    in regards to the 1/(b-a) <----- this is just a constant, so all the substitutions in the world will not change its value!

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  • I GOT 4 AS MY GRADE YEY! you helped me so thank you!

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  • @cyborg939 , it is F(5)-F(1)/b-a, please note the capital letters used.

  • ahhh your left handed lol 

  • YOU ARE MY Fav!

  • Why don't you do f(5)-f(1)/(5-1)? Isn't that the average value theorem? In this case, it does produce a different answer. The formula you used is the mean value theorem. Is there a difference and how do you choose which formula to use?

  • you friends with Sal? you guys are awesome

  • i would not substitute, just FOIL the function out and simplify it, then integrate it normally.

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