The middle most term(s) of the ap -11,-7,-3,.....,49 is
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Answer:
Let total no of terms=n
here,a=-11,d=-7-(-11)=-7+11=4, an=49
an=a+(n-1)d
49=-11+(n-1)4
49+11=(n-1)4
60=(n-1)4
n-1=60/4
n-1=15
n=15+1
n=16
so middle most term=n/2=16/2=8term
now,
a8=a+(n-1)d
a8=-11+(8-1)4
a8=-11+(7)4
a8=11+28
a8=39
hope it will help you.
so middle most term = 39
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