Question

1+2+3+...+49+50=

Answer 1

s=n(n+1)/2

Answer 2

50.51/2=25.51

Answer 3

\[\sum_{k=1}^{n}k=\frac{n(n+1)}{2} \implies \sum_{k=1}^{50}=\frac{50(51)}{2}=1275\]

Answer 4

don't you think it's much much easier to be solved

Answer 5

ya.........

Answer 6

....No? That is the easiest way to solve it? lol

Answer 7

We can do this by two methods:
1.The Formula Method(malevolence has already done it)
2.The Gaussian Pairing Tool :
50+1=51,49+2=51......therefore 1+2+.......+49+50 = 51*50/2 = 1275

Answer 8

You could just add them up but you'll get the same number...

Answer 9

lol

Answer 10

i mean just solve it not writing the formula

Answer 11

dnt complicate it aron

Answer 12

The "Gaussian Pairing Tool" is the formula...

Answer 13

Its just generalized to n things being added...I just wanted to show you where it came from...Type it into wolfram if you just want the number.

Answer 14

we can also use programing :D

Answer 15

lol

Answer 16

no dont....

Answer 17

w8 lemme make it :D

Answer 18

can u teach me about addition of harmonic mean

Answer 19

hey let's pass it . this question doesn't worth to discuss on

Answer 20

tanu did that in high school bt may b i will revise on tuesday and then teach u ok

Answer 21

it's for elementry school

Answer 22

malevolence ur good

Answer 23

a program that calculates sum of arithematic series with difference =1