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Use Gauss's approach to find the following sums (do not use formulas).
a. 1 + 2 + 3 + 4 +...+ 102
b. 1 + 3 + 5 + 7 +...+1001

a. The sum of the sequence is ?
My answer 102-51(103)= 5,253
b. The sum of the sequence is?
My answer 500.3(1,002)=501,300.6

Are my answers correct? If not why, and how do I get the correct answers?

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