partial fractions?

[rotund juniper]

idk if this is partial fractions, but someone help me pls

[brittle drift]

yh it is

expand denominator then use polynomial division

then do partial fractions on remainder

[rotund juniper]

im pretty sure there is another way of doing this

but ill try

[brittle drift]

i dont thing there is but ping me if some1 has another way

[rotund juniper]

someone else is typing about this so yeah

[brittle drift]

i just done it

u dont even need partial fracts

its just polynomial

thats why its only 3 marks

[rotund juniper]

i still dont get it

[brittle drift]

whats the answer just so ik i did it right

[rotund juniper]

i would usually do grid method

[pine sail]

C = 8

any1 know how to find the validity for this

[rotund juniper]

nope

[brittle drift]

is this binomial

[pine sail]

yes

[brittle drift]

do the expansion then plug in 0.1 into your expansion and the orginal

and compare

smething like that i think

[pine sail]

no like ? < x < ?

how to find that

the range of validity

[brittle drift]

ohh

mod x is greater than 0.25

[pine sail]

idk how to do it since its like a double binomial

[brittle drift]

yhh ik what u mean

u always use the smaler

[pine sail]

how u get that

oh so as the numerator is smaller ignore the bottom one

[brittle drift]

yhh

[pine sail]

calm

thx

[rotund juniper]

@brittle drift do you know another way instead of long division

[brittle drift]

nope

[idle needle]

Have you tried comparing coefficients

[brittle drift]

long division is probably gonna b the easiest way aswell

[rotund juniper]

no

idk how to do that

[brittle drift]

https://www.youtube.com/watch?v=PyO49HvuKv8

i usually watch this guy n he does some other thing

so thats a diff way

[pine sail]

is it me or in year 2 they dont ask year 1 binomial expansion questions anymore

[idle needle]

You can rewrite the bottom expression into a single fraction like the top one and equate them to find A, B and C

[pine sail]

ive only encountered year 2 binomial expansion questions
like (1+x)^n where n is a fraction or negative number

[rotund juniper]

they might ask you for recap of smth

[brittle drift]

ive seen year 1 binomal qs in alevel past papers so it do come up

but not often ngl