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# Binomial watch

1. Find the first 3 terms in the expanision.
(x+4)/(1+3x)^2

So far I've done
(x+4)(1+3x)^-2

I'm confused for the next step.
2. (Original post by Ggvvf)
Find the first 3 terms in the expanision.
(x+4)/(1+3x)^2

So far I've done
(x+4)(1+3x)^-2

I'm confused for the next step.
Perform binomial expansion on both terms up to the first 3 terms you need then multiply them together and collect the terms you require.
3. (Original post by Ggvvf)
Find the first 3 terms in the expanision.
(x+4)/(1+3x)^2

So far I've done
(x+4)(1+3x)^-2

I'm confused for the next step.
What would help is for you to define clearly to yourself what the 'first 3 terms' means in term of powers of x and then use that when you are expanding things out, which is what you need to do with the ^-2 now.

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