The sum of 20th and 29th term of an
arithmetic progression is 12.
The value of the 23rd term is 12.
Find the common difference,
d =
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Step-by-step explanation:
a+19d+a+28d=12
2a+47d=12. -1
a+22d=12. -2
by 1 and 2
d=-4
a=100
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