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ICSE Class 10 Answered

Find the 10th term from the end of the A.P 4, 9, 14........., 254
Asked by ahonasarkar02 | 10 Jul, 2018, 10:32: PM
answered-by-expert Expert Answer
4, 9, 14........., 254
a = 4 and d = 5
tn = 254
a + (n - 1)d = 254
4 + (n - 1) × 5 = 254
5(n - 1) = 250
n - 1 = 50
n = 51 
Hence, 10th term from the end is t42
t42  = a + (42 - 1)d
t42 = 4 + 41 × 5 = 209
Answered by Sneha shidid | 11 Jul, 2018, 10:32: AM

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