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Q: What is the sum of 1 plus 1 plus 2?

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Sum = 79*(79+1)/2 = 79*80/2 = 3160

if (n%2==0) sum=n/2*(n+1); else sum=(n+1)/2*n;

The sum of the numbers given is 31. 1 + 2 + 4 + 8 + ... + 2n = 2n+1 - 1

1+2+4 = 7

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You add 1 plus another one and you get 2

2 + 1 = 3

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5050

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81*82/2= 3321

The answer to an addition problem is called the sum.The sum of 2 plus 2 is 4.

Yes. Sum of powers of 2 from 20 to 2n is (2(n + 1) - 1) or (2 x 2n) -1 So sum of 1 + 2...+ 4096 is 8192 - 1 ie 8191.

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Its sum is: 1/2+1/2 = 1

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The answer is 1830.

The mater is that if you do 1+1=2 then just add the sum with its self, so you have 2+2=4 and 4 is the answer

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The sum of 3x plus 2 and -4 plus 3 is 3x+1 if the equation is (3x+2)+(-4+3). If they are two separate questions, 3x+2 remains as itself while -4+3=-1.