anonymous
  • anonymous
Evaluate the definite integral.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
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anonymous
  • anonymous
go into this site callec web 2.0 calc it type the problem into the calculator and BAM theres the answer! :) or better yet, get out paper and actually write out the problem
anonymous
  • anonymous
and solve it that way

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More answers

Loser66
  • Loser66
@onegirl do you have any idea?
anonymous
  • anonymous
am i just going to substitute u or?
Loser66
  • Loser66
yes, which one? u =?
Loser66
  • Loser66
try u = x^2 +1 then du =?
anonymous
  • anonymous
is du the derivative of it? or
Loser66
  • Loser66
yes!! try, if you make some mistake, i correct it then, but the most important is trying!!
anonymous
  • anonymous
ok
Loser66
  • Loser66
don't worry, I dare not say anything further, but to this problem, I am ok
anonymous
  • anonymous
okay i'll try it t
anonymous
  • anonymous
okay for the derivative i got 2x
Loser66
  • Loser66
2xdx girl. ok, let put it in neat du = 2x dx , right?
Loser66
  • Loser66
got it?
anonymous
  • anonymous
okay
Loser66
  • Loser66
ok, now, we change the limit, have to. tell me, if x =0, u =?
Loser66
  • Loser66
do you know what I am doing?
anonymous
  • anonymous
hmmm no
Loser66
  • Loser66
ok, let me explain. Originally, you have x, dx and limits respect to x then, you change (substitute) to u, so, dx must change to du and limits must follow u, right?
anonymous
  • anonymous
yes
anonymous
  • anonymous
so u will be 0 too right?
anonymous
  • anonymous
Me? I live in USA
Loser66
  • Loser66
ok, take step!! forget my question, I thought you don't understand what I mean so, made that question to find out another way for you to come up the problem, now, you got it, no need more . take a look
anonymous
  • anonymous
ok lol my bad
Loser66
  • Loser66
|dw:1368223122327:dw|
Loser66
  • Loser66
calculate it and tell me the answer
Loser66
  • Loser66
|dw:1368223207231:dw|
anonymous
  • anonymous
umm 5?
Loser66
  • Loser66
perfect! now replace
Loser66
  • Loser66
|dw:1368223296128:dw|
anonymous
  • anonymous
ok
Loser66
  • Loser66
you go girl!!! can step up from here?
anonymous
  • anonymous
so now i find the integral or?
Loser66
  • Loser66
am I rude when saying that? sorry if you feel so, or I take it back?
anonymous
  • anonymous
noo is that a sqrt sign?
Loser66
  • Loser66
yep, from the beginning until now, we don't "substitute " that sqrt, so it's there still
anonymous
  • anonymous
okay
Loser66
  • Loser66
so, what's the answer?
anonymous
  • anonymous
so i got (2 u^(3/2))/3+C
Loser66
  • Loser66
something wrong there, 1st you forgot 1/2 from du, and it cancel out with your 2/3 to get 1/3 only 2nd, it has a limits so, you have to replace those limit where you have u.
Loser66
  • Loser66
|dw:1368223960531:dw|
Loser66
  • Loser66
|dw:1368224029766:dw| that's the final one
anonymous
  • anonymous
ohhh okay
Loser66
  • Loser66
glad to hear that.
anonymous
  • anonymous
thanks!
Loser66
  • Loser66
yw

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