Which term of the A.P.- 21, 18 ,15....is -81 ? Also is any term 0 ? Give reason for your answer .
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The given Arithmetic Progression is 21, 18, 15,…,0,….
The first term = a = 21
Now the common difference = d = -3
nth term = 0
We need to find n.
⇒ The 8th of the given Arithmetic Progression is 0.
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