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An=144,. a=23,. d=7 find the n |
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Answer» a(n) = a + d( n - 1 ) 144 - 23 = 7( n - 1 ) 121/7 = n - 1 121/7 + 1 = n (121 + 7 )/7 = n 128/7 = n |
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