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Earn +20 ptsQ: Find the sum of 1 9 plus 5 9 plus 2 9?
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How do you find the sum of 1 plus 2 plus 3 plus 4 plus . plus 79?
Sum = 79*(79+1)/2 = 79*80/2 = 3160
What is sum of the following1 plus 2 plus 4 plus 8 plus 16 plus?
The sum of the numbers given is 31. 1 + 2 + 4 + 8 + ... + 2n = 2n+1 - 1
What is the sum of minus one plus minus one?
The sum of -1 and -1 is -2.
What is the sum of 1 plus 2 plus 3 plus ... plus 100?
5050
What negative 1 plus negative 2?
The sum of -1 and -2 is -3.
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