Find the 6th term from the end of the
AP: 5, 2,-1,-4, ..., - 31.
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let the -31 be nth number
-31=5+(n-1)(-3)
=>-31=5-3n+3
=>-31=8-3n
=>3n=39
=>n=13
so the 6th digit from end is 8
=>8th term = 5+7(-3) = 5-21 = -16
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