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Question: please answer 20b...

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20 Evaluate each of the following sums: (a) 12+3+. 152 153 (b) 12+32+... +1522 1532 1152 (d) 2 6+18+ . 2(3)152 + 2(3)153 (e) 1.2+2.3+3.4.. 152-153+153 154 1-2 2.3 3.4 152 153 153.154

Please answer 20b

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