Question

*Which term of the AP 21, 18, 15, ... , is zero?*

1️⃣ 7
2️⃣ 8
3️⃣ 9
4️⃣ 6​

Answer 1

Answer:

option (2)

Step-by-step explanation:

let

a = 21 , d = -3

let us take

a7 = a+6d

   = 21-18

   =-3

a8 = a+7d

    =21-21

    = 0

hence 8 is the answer

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