Question

Given the sequence 7,5.5,4,2.5...which term has the value -23?

Answer 1

Answer:

n=19

Step-by-step explanation:

Answer 2

Step-by-step explanation:

7 , 5.5 , 4 , 2.5 ,..........

Let -23 is the nth term of this sequence .

An = -23

a + (n - 1)d = -23

7 + (n - 1)(-1.5) = -23

-1.5(n - 1) = -30

n - 1 = -30/-1.5

n - 1 = 300/15 = 20

n = 21

So , 21th term has the value -23 .