26
The sum of the numbers given is 31. 1 + 2 + 4 + 8 + ... + 2n = 2n+1 - 1
-6
Sum = 79*(79+1)/2 = 79*80/2 = 3160
25
the sum of 2 plus 2 is 4/2+2=44
The sum is 6.
Sum = Addition 2 + 2 = 4
4
1+2+4 = 7
-2
the answer is 4
26
the sum of 2 plus 2 is 4/2+2=44
The sum of the numbers given is 31. 1 + 2 + 4 + 8 + ... + 2n = 2n+1 - 1
The answer to an addition problem is called the sum.The sum of 2 plus 2 is 4.
-6