Question

31. Find the middle most term of AP 7, 13, 19,
-, 247.​

Answer 1

Step-by-step explanation:

Answer:127

Step-by-step explanation:

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.

Mark me as brainliest plz.

Answer 2

Answer:

PLEASE MARK ME AS BRAINLIST!!!!!

Step-by-step explanation:

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 .

middle most term 127

MARK ME AS BRAINLIST PLEASE!!!!!!