Question

Find the 7th term from the end of the arithmetic progression 7, 10, 13,...., 84​

Answer 1

Answer:

66

Step-by-step explanation:

a=7 d=10-7=3 l= 84

Tn = l-(n-1) d

T7 = 84-(7-1) 3

= 84-(6)3

=84-18

=66

Answer 2

Answer:

Sólution:-

From this A.P we get:

• First term (a)=7
• Common Difference (d) =3

To find:-

• 7th term of this A.P
• n=7

Here:-

☞nth term of A.P is given by:

• a+(n-1)d

Therefore:-

7th term of this A.P, by putting the values:

• ➝a+(n-1)d
• ➝7+(7-1)3
• ➝7+(6×3)
• ➝7+18
• ➝25 (Answer)

Hence 7th term of this A.P is 25

• Hope it helps you ✔️