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# Integration by substitution watch

1. The question asked me to use the substitution u=x1/2 and on the mark scheme it leads to the expression I have boxed and placed a question mark. Can someone please explain how the fraction can simplify and lead to that expression? Thanks.
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2. (Original post by MSB47)
The question asked me to use the substitution u=x1/2 and on the mark scheme it leads to the expression I have boxed and placed a question mark. Can someone please explain how the fraction can simplify and lead to that expression? Thanks.
Divide the numerator and the denominator by u
3. (Original post by TenOfThem)
Divide the numerator and the denominator by u
How is it possible to do that? Sorry I've gone complete brain dead over this
4. (Original post by MSB47)
How is it possible to do that? Sorry I've gone complete brain dead over this
Every term in that fraction contains a u.

Just cancel one u from every term. What Ten' said.
5. (Original post by Phichi)
Every term in that fraction contains a u.

Just cancel one u from every term. What Ten' said.
ohh that makes a lot of sense now, thanks for your help

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