find the value of middle term of the A. P. 7,13,19,.......,247.
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25,31,37,43,49,55,61,67,73,79,85,91,97,103,109,115,121,127,133,139,145,151,157,163,169,175,181,187,193,199,205,211,217,223,229,235,241
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the answer for this question
247-7/6=40
add 1 to 40 =41
the middle term is 21term
7+{6×20}=127
247-7/6=40
add 1 to 40 =41
the middle term is 21term
7+{6×20}=127
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