Question: Use Polya's four-step problem-solving strategy and the problem-solving procedures presented in this lesson to solve the following exercise. Find the following sums for a, b,

Use Polya's four-step problem-solving strategy and the problem-solving procedures presented in this lesson to solve the following exercise. Find the following sums for a, b, c

A. 1 + 2 + 3 + 4 + . . . + 391 + 392 + 393 +

B. 1 + 2 + 3 + 4 + . . . + 546 + 547 + 548 + 549

C. 2 + 4 + 6 + 8 + . . . + 78 + 80 + 82 + 84

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