Question

Find the value of middle term.Of the



a.P. 7 13 19 ...... 247

Answer 1

Heya mate, Here is ur answer

a(first term)= 7

d(common difference)= a2 -a

d= 13-7

d=5

an(last term)=247

an=a+(n-1) d

247=7+(n-1) 5

247-7=(n-1) 5

240=(n-1) 5

240/5=n-1

48=n-1

48+1= n

49 = n

So, there are 49 terms in the given AP.

So, the mid term is 25 th term.

So, we need to find a25.

a25= a+(n-1) d

Here n=25

a25=7+(25-1) 5

a25=7+24×5

a25= 7+120

a25=127 .

So the middle term of the AP is 127 .

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@Laughterqueen

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Answer 2

Hope u get it ....
thanks.....