Question

3. Which term of the AP 21, 18, 15, ... is 0?​

Answer 1

Answer:

8th term

Step-by-step explanation:

(first term) a=21

common difference (d) = 18-21 = -3

let nth term = 0

nth term = a + (n-1)d

0 = 21 + (n - 1) (-3)

0 = 21 -3n+3

0 = 24 - 3n

3n = 24

n = 24/3

n = 8

0 is the 8th term...

Answer 2

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