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1. What is the next three terms of each sequence
82,75,68,61,54
5,6,8,11,15,20
2,4,8,16,32,64
2.Give two other names for AB other than BA
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82, 75, 68, 61, 54 . . . is an AP with the common difference of -7.
5, 6, 8, 11, 15, 20 . . . = .
2, 4, 8, 16, 32, 64 . . . is a GP with the common ratio 2.
Do the rest yourself.