Question

If the 27th term of an arithmetic sequence is -124 and the common difference is -11 then what was the first term?​

Answer 1

Answer:

First term   = 162.

Step-by-step explanation:

a27 = a1   - 11 (27 - 1)

= a1 - 286

So a1 - 286 =  -124

a1 = 162.