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u need to replace in the binomial expansion -_- then ull get it the final answer.8-0.9 = 7.1 ?
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u need to replace in the binomial expansion -_- then ull get it the final answer.8-0.9 = 7.1 ?
someone jst asked its part (ii) on my wall today
use the answer to part (ii) to make it easier
Thankssomeone jst asked its part (ii) on my wall today
use substitution
let (x+3x^2) be equal to u
expand (1+u)^5 using binomial formula
in the end replace u by original bracket.
wht u did?Ok. I have done so and after I substitute (x + 3x^2), my answer is:
405 x^8
But the marking scheme's answer is 675 x^8. Why are they adding the above answer to the answer in part (ii)?
u do .-.RoOkaYya G you explaining or I do?
(1 + u) ^5wht u did?
405x^8 + 270x^8 kia?Ok. I have done so and after I substitute (x + 3x^2), my answer is:
405 x^8
But the marking scheme's answer is 675 x^8. Why are they adding the above answer to the answer in part (ii)?
405x^8 + 270x^8 kia?
This was not what he asked.idiot thts wht he asked..tht y we add 270
That was easily been understand by looking at solution of part ii :/Awesome12 we add the 270 because it represents the coefficient of x^8
for expansion in part (iii) the expansion isnt complete i mean not all x^8 r included.
so u take the one from part (ii) also
-_- he said he dint understand y they add the answer to part (ii) -_- read wellThis was not what he asked.
wht u mean?That was easily been understand by looking at solution of part ii :/
My bad .-.-_- he said he dint understand y they add the answer to part (ii) -_- read well
Nothing. Its better I keep shut. .-.wht u mean?
My school said if you get an A grade in As level maths, and if you maintain that A in your A level, then your A grade in A level and As level will become an overall A* so yeah you have a good chanceThanks again. BTW, I did my AS level in May/June 2014 session and scored "a". Based on what I calculated, the minimum score I got is 110. But I was just wondering what are my chances of scoring A* in A levels.
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