In an AP the common difference D = -4 and the 7 term is a7 is 4 then find the first term .
Answers
Answered by
42
Answer:
28
Step-by-step explanation:
Given, Common difference = -4.
nth term of the A.P an = a + (n - 1) * d
Given, 7th term(a₇) is 4.
∴ a₇ = -4
⇒ a + (7 - 1) * (-4) = 4
⇒ a + 6 * -4 = 4
⇒ a - 24 =4
⇒ a = 28.
Therefore, the first term a = 28.
Hope it helps!
Answered by
0
Given, Common difference = -4.
nth term of the A.P an = a + (n - 1) * d
Given, 7th term(a₇) is 4.
∴ a₇ = -4
⇒ a + (7 - 1) * (-4) = 4
⇒ a + 6 * -4 = 4
⇒ a - 24 =4
⇒ a = 28.
Therefore, the first term a = 28.
Similar questions