diamondboy
  • diamondboy
Question
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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diamondboy
  • diamondboy
|dw:1442085598415:dw|
diamondboy
  • diamondboy
@Ashleyisakitty
diamondboy
  • diamondboy
Could you please help me out @IrishBoy123

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More answers

IrishBoy123
  • IrishBoy123
|dw:1442085754297:dw|
IrishBoy123
  • IrishBoy123
|dw:1442085839354:dw|
IrishBoy123
  • IrishBoy123
it's worth doing this first!
diamondboy
  • diamondboy
|dw:1442085908400:dw|
IrishBoy123
  • IrishBoy123
IOW, you can do loads of boring subs or you can start spotting these patterns and start doing integration in your head pretty much
diamondboy
  • diamondboy
|dw:1442086164257:dw|
IrishBoy123
  • IrishBoy123
|dw:1442086191680:dw|
diamondboy
  • diamondboy
+C
diamondboy
  • diamondboy
Is this the answer?
IrishBoy123
  • IrishBoy123
|dw:1442086517027:dw| adjustment needed?
Jhannybean
  • Jhannybean
\[\sf \int \frac{2x^2}{\sqrt{5+x^3}}dx\implies 2\int \frac{x^2}{\sqrt{5+x^3}}dx \]\[\sf u=5+x^3 ~,~ du = 3x^2dx \implies \frac{du}{3}=x^2dx \]resub. \[\sf \frac{2}{3}\int \frac{du}{u^{1/2}}\]
diamondboy
  • diamondboy
I finally got the answer
diamondboy
  • diamondboy
yep @Jhannybean that was exactly how I did it.
Jhannybean
  • Jhannybean
I'm getting \(\dfrac{2}{3}\) and @IrishBoy123 is getting \(\dfrac{3}{2}\)?
diamondboy
  • diamondboy
I got 4/3 (after final simplification)
IrishBoy123
  • IrishBoy123
no! |dw:1442086992183:dw|
diamondboy
  • diamondboy
Thanks guys tho that was my final attempt
Jhannybean
  • Jhannybean
\[\sf 2\int\frac{1}{u^{1/2}} \cdot \frac{du}{3}= \frac{2}{3}\int\frac{du}{u^{1/2}}\]Oh okay
Jhannybean
  • Jhannybean
I thought I was making errors.... just woke up.
IrishBoy123
  • IrishBoy123
|dw:1442087204185:dw| |dw:1442087262250:dw| lol!!!!
Jhannybean
  • Jhannybean
You spot patterns after you do a whole bunch of boring subs :P It's been years since ive done techniques of integration lol.
IrishBoy123
  • IrishBoy123
@Jhannybean agreed!
diamondboy
  • diamondboy
alright I believe none of u need anymore medals
diamondboy
  • diamondboy
Thanks guys

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