Question

1+2+4+8+16+32.............. = ? Find the Sum

Answer 1

64, 128,256,512

Answer 2

1 (1+2+4+8+16+32.............. )

(2-1)(1+2+4+8+16+32.............. )

= 2 + 4 +8+ 16 +32 ....... -1-2-4-8-16-32..........

= -1

Answer 3

its infinity

Answer 4

Lol...i knw....Nw tell me wats the wrong in my sloution

Answer 5

huh they haven't given the last term and btw its basically a geometric progression

Answer 6

Do u Find any mistake in the way i did....

Answer 7

yeah !!!!!
there is a mistake in ur where did that -1 come from????

Answer 8

2-1 = 1...................lol

Answer 9

limit help....

Answer 10

... 4, 8, 16, 32 ... 512
or 4(1), 4(2), 4(4), 4(8), ... , 4(128)
or 4(2^0), 4(2^1), 4(2^2), 4(2^3), ... , 4(2^7)

S(n) = 4 ∑ 2^k [ k = 0 to n ]
....... = 4 [ 2^(n+1) - 1 ]

S(7) = 4 [ 2^(7+1) - 1 ]
....... = 1020

Answer 11

Lol....i dont need the answer..) i want to knw is there any mistake in my solution

Answer 12

don't angry @Yahoo! it's my limit

Answer 13

lol....i am not angry ...this is a Funny....question....

Answer 14

just apply my method and get the answer

Answer 15

@Yahoo! : its not that let the series be A
by ur terms
=> (2-1)A
=>2A -A =A

Answer 16

oho...Again..... Tell me is there any wrong...lol

Answer 17

got it!!!!

Answer 18

\[\Huge{\bf{\color{blue}{i know you can }\color{red}{doit}}}\]

Answer 19

I hate these! I can't see see what is wrong but obviously there is something as it should total infinity... I would just do the 2-1 in the bracket and get the same answer... (is it not that there will always be one last term in the positive set of numbers which is much bigger than its negative counterpart in that set, and eventually that is infinity..?)

Answer 20

1 (1+2+4+8+16+32.............. )

(2-1)(1+2+4+8+16+32.............. )

= 2 + 4 +8+ 16 +32 ....... -1-2-4-8-16-32..........

= -1

Answer 21

Also... first terms, 2-1 = 1, second terms: 4-2 = 2, so you DO get the original series back, and it does NOT equal -1.

Answer 22

2+4+8+16+32..................+2n
1+2+4+8+16+32............. + n {subtracting}
-----------------------------
1+2+4+8+16 +32+...........n

Answer 23

take make sense @DHASHNI

Answer 24

WAT!!!

Answer 25

*that

Answer 26

Sorry

Answer 27

exactly @DHASHNI ! have a medal too :)

Answer 28

You are subtracting sets of different cardinality. That's like adding unlike terms, you can't do it.

Answer 29

1 (1+2+4+8+16+32.............. )

(2-1)(1+2+4+8+16+32.............. )

= (2 + 4 +8+ 16 +32 +64+......)+( -1-2-4-8-16 -32 .........)

= 63+.....