Question

Given an = 4, d =2, sn = -14, find n and a. ​

Answer 1

Given:

an=4

d=2

sn= -14

n=?

a=?

we know that

$\begin{gathered}a_n = a + (n - 1)×d \\ = 4 = a + (n - 1) \times2 \\ = 4 = a + 2n - 2 \\ = 4 + 2 = a + 2n \\ = \cfrac {6}{2} = a + n \\ = 3 - n = a\end{gathered}$

Answer 2

oye main tumhare liye itne sare question likh raha hu tum bhi dekho yar