BlizzardofFire
s=11/3+1/9...



This Question is Closed

RadEn
Best Response
You've already chosen the best response.
0
use formula :
s= a/(1r)
with a=first term
r=ratio=u2/u1=u3/u2

BlizzardofFire
Best Response
You've already chosen the best response.
0
huh?

HELLSGUARDIAN
Best Response
You've already chosen the best response.
1
its a geometric progression with contant ratio(r)=1/3
and its first term(a) is 1
hence we can use a formula for the sum of this g.p. as a(1r)

RadEn
Best Response
You've already chosen the best response.
0
ok, a=1 and r=(1/3)/1 = 1/3
plug in a=1 and r=1/3 to that formula!

BlizzardofFire
Best Response
You've already chosen the best response.
0
soooo its 3/4??

HELLSGUARDIAN
Best Response
You've already chosen the best response.
1
yup

HELLSGUARDIAN
Best Response
You've already chosen the best response.
1
sorry i did a mistake in the formula it will be a/(1r)

BlizzardofFire
Best Response
You've already chosen the best response.
0
do u do it the same way when the question is 4/3+2/3+1/3...

RadEn
Best Response
You've already chosen the best response.
0
yea, that's right.

HELLSGUARDIAN
Best Response
You've already chosen the best response.
1
yes here the ratio(r) is 1/2 ..

BlizzardofFire
Best Response
You've already chosen the best response.
0
k thx

RadEn
Best Response
You've already chosen the best response.
0
oke, what's answer do u get ?