+1679 +1679 +1679 +1679 +4 The sequence 9, 18, 27, 36, 45, 54,.. consists of successive multiples of 9. This sequence is then altered by multiplying every other term by (-1), starting with the first term, to produce the new sequence- 9, 18, -27, 36, 45, 54.... If the sum of the first
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+4 +1145 +1145 +1145 +180 +671 +671 +671 +671 +671 +671 +671 Nov 28, 2023

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