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# C1 Soloman Differentiation questions help puhleasee :3 watch

1. (Original post by Dinaa)
I don't know, I'm confused
The only reason I would be dividing is if I had multiplied by something in the first place...

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2. Another question

y= x^2 + 3x^1/2

a) Find dy/dx

dy/dx= 2x + 3/2x^-1/2

b) Show that 2x d^2y/dx^2 + dy/dx - 6x = 0

d^2y/dx^2= 2 -3/4x^-3/2

I was confused here but still carried on to do:

2x(2 - 3/4x^-3/2) + (2x+3/2x^-1/2) - 6x

-3/2x^-3/2 + 3/2x^-1/2

but now.. what?
3. (Original post by samb1234)
The only reason I would be dividing is if I had multiplied by something in the first place...

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So..
4. (Original post by Dinaa)
So..
So, you take out the x^3/2 and put it on the bottom. And then complete the square.
5. (Original post by Dinaa)
So..
Multiply your differential by what you end up dividing by

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Updated: May 12, 2015
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