Find the middle term of an AP 7,14, 21,----- 343 find middle term
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a1=7
a2=14
d=a2-a1
=)14-7
=)7
an=343
an=a+(n-1)d
343=7+(n-1)7
343=7+7n-7
343=7n
n=343/7
n=49
hence middle term =49
a2=14
d=a2-a1
=)14-7
=)7
an=343
an=a+(n-1)d
343=7+(n-1)7
343=7+7n-7
343=7n
n=343/7
n=49
hence middle term =49
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