Which term of the AP 21,18,15........ is zero (0). please solve and

1.	Which term of the AP 21,18,15........ is zero (0). please solve and send pic.
Answer» Answer: The given is in A.P. ⇔ Arithmetic Progression. a=21 a+d=18 -------------- d = -3 ⇒a(nth TERM)= a+(n-1)d ⇒0=a+(n-1)d ⇒0=21+[n-1](-3) ⇒n-1 = -21/-3 ⇒n-1 = 7 ⇒n =8.

Which term of the AP 21,18,15........ is zero (0). please solve and send pic.

Answer»

Answer:

The given is in A.P.

⇔ Arithmetic Progression.

a=21

a+d=18

--------------

d = -3

⇒a(nth TERM)= a+(n-1)d

⇒0=a+(n-1)d

⇒0=21+[n-1](-3)

⇒n-1 = -21/-3

⇒n-1 = 7

⇒n =8.

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Which term of the AP 21,18,15........ is zero (0)​. please solve and send pic. ​

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Which term of the AP 21,18,15........ is zero (0). please solve and send pic.