Find the value of the middle most term of the ap 7,13,19.........,247
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Common difference = 13-7=6
First term= 7
Tn=a+(n-1)d
247=7+(n-1)6
{247-7}/6=n-1
240/6=n-1
40+1=n
N=41
Hence the middle 21th middle term is
Tn=a+(n-1)d
t21=7+(21-1)6
T21=7+(20)6
T21=7+120
T21=127
Middle most term is 127
First term= 7
Tn=a+(n-1)d
247=7+(n-1)6
{247-7}/6=n-1
240/6=n-1
40+1=n
N=41
Hence the middle 21th middle term is
Tn=a+(n-1)d
t21=7+(21-1)6
T21=7+(20)6
T21=7+120
T21=127
Middle most term is 127
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