Question

Arithmetic sequences algebra

Answer 1

As given arithmetic sequence is :-

-17 , -13 , -9

So, here we have to find a12

a ( 1st term ) = -17

d ( common difference) = a2 - a1

d = -13 -(-17)

d = 4

nth place = a12

Now we know that to find any term we apply formula :-

an = a + (n-1)d

So putting Values in above mentioned formula :-

a12 = -17 + ( 12-1) 4

a12 = -17 + (11)4

a12 = -17 + 44

a12 = 27

Hope it helps