Find the 20th term from the last end of AP 7,12, 18.......147
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Answer:
From the question
a = 7
d = 12-7 = 5
Now 20th term from the end
= l - (n - 1)d
= 147-(20-1)5
= 147 - (19×5)
= 147 - 95
= 52
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