0. Show that al, a" . . ., a", . . . form an AP where a is defined as – InterviewSolution

1.

0. Show that al, a" . . ., a", . . . form an AP where a is defined as below :(i) a = 3+4n(m) a, 9-5n

Answer»

i) a(n) = 3+4na(1) = 7a(2) = 11a(3) = 15so common difference is 4 , an AP therefore.

ii) a(n) = 9-5na(1) = 4a(2) = -1a(3) = 9-15 = -6So common difference is -5, an AP therefore

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