Question

What is S10 for 1+2+4+8+...?

Answer 1

you mean sum of 10 terms?

Answer 2

If these answers choices relate then yes:

256.5
511
1,023
2047

Answer 3

$10

Answer 4

| was missing. @AravindG

Answer 5

Well this is a geometric progression

Answer 6

Can you find the common ratio ?

Answer 7

*2?

Answer 8

yes :)

Answer 9

Now \[S_n=\dfrac{a(r^n-1)}{(r-1)}\]

Answer 10

This is the sum formula .Put r=2 a=1

Answer 11

n=10 .You will get sum

Answer 12

using the geometric formula, find out the 10th term:\[a_n=a(2)^{n-1}\]\[a_{10}=1(2)^{10-1}\]\[a_10=2^9\]\[a_10=512\]now using the formula for the sum of a finite geometric series, find the sum:\[{a_1(1-r^n)}\over1-r\]\[{1(1-2^10)}\over1-2\]\[(1-1024)\over-1\]\[-1023\over-1\]\[S_10=1023\]

Answer 13

@yummydum you didnt leave anything to do for the asker ? :/

Answer 14

wow im bad at this..

Answer 15

@AravindG : We have so many bad users here.. :l

Answer 16

Thats sad :/

Answer 17

han! aur aik ho tum, kaminay kaheen k! :P

Answer 18

i leave..

Answer 19

0_0...

Answer 20

@xkylex Dont mind our conversation..Did you understand how to do it?

Answer 21

I understood perfectly. Thank You all!

Answer 22

yw :)