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Mathematics 30 Online
OpenStudy (anonymous):

heyy i need help with something please!

OpenStudy (anonymous):

what do you need help with?

OpenStudy (anonymous):

yeah fire away missy

OpenStudy (anonymous):

thank you :) ..in binomial expansion..what's the difference between doing it in ascending powers of x and descending powers of x? :(

OpenStudy (amistre64):

x,x^2,x^3,x^4,.... ascending

OpenStudy (anonymous):

Ascending means going up in value from lowest to highest, and descending is the opposite.

OpenStudy (amistre64):

cute pic :)

OpenStudy (anonymous):

the order of the coefficients is reversed

OpenStudy (anonymous):

id say hot..dont mind betts

OpenStudy (amistre64):

i got my pic off ebay lol

OpenStudy (anonymous):

thanks :) lol

OpenStudy (anonymous):

My picture is from a large musical production I was in :) lead male role. audience of 700!

OpenStudy (amistre64):

my pic was me waking up to the evil cat laying on me :)

OpenStudy (amistre64):

you got good answers? yes?

OpenStudy (anonymous):

so that's ascending

OpenStudy (anonymous):

yes thank you!

OpenStudy (anonymous):

yes the example he game is ascending.

OpenStudy (anonymous):

*gave

OpenStudy (amistre64):

ascending is to get up, to rise, to fill the balloon and float away into the trees and get stuck becasue you forgot to reel in the tag lines lol

OpenStudy (amistre64):

descending is what happens right after that when you jump out and land on the ground

OpenStudy (anonymous):

and descending would mean the order of coefficients reversed or..the powers go from higest to lowest? :S

OpenStudy (anonymous):

always ready to help gorgeousness..it would mean both i think

OpenStudy (amistre64):

engorgeousness too ;)

OpenStudy (anonymous):

yes that is correct bettts

OpenStudy (amistre64):

..... that didnt sound right lol

OpenStudy (anonymous):

it means the coeeficient of x^n is reversed

OpenStudy (anonymous):

thank you so much!

OpenStudy (anonymous):

all of youu :)

OpenStudy (amistre64):

it was thinking of a large pepperoni pizza when i made that comment, dont mind the man behind the curtain :)

OpenStudy (anonymous):

makes my day..

OpenStudy (anonymous):

this site is so cool :)

OpenStudy (amistre64):

yeah, it like being able to go somewhere without leaving the house...unless you go to the library for internet access

OpenStudy (anonymous):

yeah ur always welcome...

OpenStudy (anonymous):

do y'all mind me giving the question? it's okay you don't have to do it for me :( lol

OpenStudy (anonymous):

no we dont

OpenStudy (anonymous):

find the first 3 terms in the expansionn of (2x-3/x)^5 in descending powers of x

OpenStudy (amistre64):

the question eh....... sounds like a trap :)

OpenStudy (amistre64):

is that (-3/x)? or (2x-3)/x ??

OpenStudy (amistre64):

1,5,10,10,5,1..... whichever way we go

OpenStudy (anonymous):

multiply that by the coefficients of 2 and 3

OpenStudy (amistre64):

\[(\frac{2x-3}{x})^5? or (2x-\frac{3}{x})^5\]

OpenStudy (amistre64):

gotta know wha tthe question is b4 we can answer it appropriately

OpenStudy (amistre64):

does that make sense to you? in other words, the way you wrote the problem is confusing and we need you to clear it up

OpenStudy (amistre64):

[2-(3/x)]^5 would be +(243/x^5)+(810/x^4) +(1080/x^3)

OpenStudy (amistre64):

make that: -(243/x^5)+(810/x^4) -(1080/x^3)

OpenStudy (amistre64):

i forgot to factor the negative lol

OpenStudy (anonymous):

yeah hes right

OpenStudy (amistre64):

the other way would be.... (2x -(3/x))^5 (-3/x)^5 +5(2x)(-3/x)^4 +10(-3/x)^3 (2x)^4 (-240/x) +(810/x^3) - (4320x)

OpenStudy (amistre64):

maybe?

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