Which term of the AP 21,18,15........ is zero (0). please solve and send pic.
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Answer:
The given is in A.P.
⇔ Arithmetic Progression.
a=21
a+d=18
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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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