# Differentiating and simplifying

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#1
Hi,
Could someone pls help be solve Roys identity. I know that one has to use the quotient rule and I have put the final answer one gets. I am puzzled how to reach to the answer with all the simplication.

Thanks
0
3 weeks ago
#2
Is this a level math
0
3 weeks ago
#3
(Original post by dn6326)
Hi,
Could someone pls help be solve Roys identity. I know that one has to use the quotient rule and I have put the final answer one gets. I am puzzled how to reach to the answer with all the simplication.

Thanks
What do yo get when you use the quotient rule?
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#4
(Original post by mqb2766)
What do yo get when you use the quotient rule?
pls see attachment
0
3 weeks ago
#5
(Original post by dn6326)
pls see attachment
From the answer you know where you want the p1, p2 and (p1+p2) terms to be in the final fraction, so combine the terms (multiply/divide) in the expression to get what you're after.
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#6
(Original post by mqb2766)
From the answer you know where you want the p1, p2 and (p1+p2) terms to be in the final fraction, so combine the terms (multiply/divide) in the expression to get what you're after.
Would be helpful if you could show the steps
0
3 weeks ago
#7
(Original post by dn6326)
Would be helpful if you could show the steps
Factorise the 4 and y term to begin with. You'll benefit more trying to do as much as possible yourself.
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#8
(Original post by mqb2766)
Factorise the 4 and y term to begin with. You'll benefit more trying to do as much as possible yourself.
Hi there

I have factored out the y and 1/4 term, I am just really puzzled on the next steps. I have sat for about an hour now - really not moving forward! I would appreciate your wisdom please!! Any steps helpful for me to then work from if OK please ?
0
3 weeks ago
#9
(Original post by dn6326)
Hi there

I have factored out the y and 1/4 term, I am just really puzzled on the next steps. I have sat for about an hour now - really not moving forward! I would appreciate your wisdom please!! Any steps helpful for me to then work from if OK please ?
If you upload what you've done?
The general advice is the same. Get the p1 and (p1+p2) terms on the denominator by factorising or dividing numerator and denominator. The answer tells you the powers you want.
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