# help with differential equations

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#1
0
4 weeks ago
#2
Can you post your working so far, and what you're struggling with, then I can help
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#3
(Original post by mathstutor24)
Can you post your working so far, and what you're struggling with, then I can help
0
4 weeks ago
#4
(Original post by Silentieyes)
so the bits you did not cross out are good.

you can write y/(y + 1) as (y+ 1 - 1) / ( y + 1 )
1
4 weeks ago
#5
Make use of partial fractions.
1
4 weeks ago
#6
This is correct:

If you are struggling to integrate the LHS, you can use the substitution of u=y+1.
Last edited by mathstutor24; 4 weeks ago
0
4 weeks ago
#7
Silentieyes - can you post the actual question for Q6 please?
1
#8
(Original post by mathstutor24)
Silentieyes - can you post the actual question for Q6 please?
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#9
0
4 weeks ago
#10
(Original post by Silentieyes)
the y should still be a u
0
4 weeks ago
#11

The "y" circled in red should be a "u". Once you sub back in u=y+1, your final integrated equation should be:

Then put in your values of x and y (as you have done) to find the value of C.
0
4 weeks ago
#12

Regarding question 6, you need to use the values you have been given of R and Theta to calculate the value of C (highlighted in yellow) to find the complete equation.
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