1+2+3+4+5+6.............................+100=?

This is an Arithmetic Sequence
a = 1 , d = 2-1=1 , n = 100
The sum : [ a + a + ( n - 1 ) x d ] x n / 2
= [ 1 + 1 + ( 100 - 1 ) x 1 ] x 100 / 2
= 5050

ans 5050

1+2+3+4+5+6.............................+100=5050


希望幫到你.

1+2+3+4+5+6.............................+100=5050

5050

((1+100)*100)/2

1+2+3+4+5+6.............................+100=5050 選我最佳回答

設n為加至之數
n(n+1)/2
=100(100+1)/2
=50*101
=5050

Ans: 1+2+3+4+5+...........+100係等於5050。

答案係 5050.
用excel可以好快計到.

希望幫到你.

1+9 2+8 3+7 4+6 5+5 5+5 4+6 3+7 2+8 1+9=100
50+50=100

1+2+3+4+5+6......+100=5050