Question

What is the first term in the sequence for which d = -2 and a7 = 3?
a.
-6
c.
15
b.
12
d.
-12

Answer 1

Answer:

(c.) a=15

Step-by-step explanation:

Given:-

d=(-2),a₇=3

To Find:-

a

Formula Applied:-

aₙ=a+(n-1)(d)

Solution:-

a₇=a+(7-1)(d)

3=a+6(-2)

3=a-12

a=3+12

a=15