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InterviewSolution
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An ap 5,12,19 has 50 terms..... and last terms is |
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Answer» [ An = A + ( n - 1 ) D ],, A1 - A2 = 12 - 5 = 7 ,, A50 = 5 +( 50 - 1 ) 7 ,,= 5 + 49 × 7 = 343 + 5 = 348 .. hence proved .. thank you “348”. HoPe It HeLpS yOu?? a = 5 , d = a2 - a1 = 12 - 5 = 7 , n = 50 , an = ? Solve : a50 = a + (n - 1)d = 5 + (50-1)7 = 5 + (49)7 = 5 + 343 a50=348 A= 5 ,common difference =a2-a1. => 12 - 5 = 7. So the 50 terms is a50= 5+(50-1)7. a50=348 |
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