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Q.

210 is the ____ term for the AP: 21, 42, 63, 84,... .


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Detailed Solution

210 is the 10th term for the AP: 21, 42, 63, 84,... .
Given series is 21,42,63,84….
From the above series we get,
a   = 21
And,
d=4221 d=21   Now, for finding term for 210,
a n  = 210 in the equation a n =a+(n1)d   .
210=21+ n1 21 210=21+21n21 n= 210 21 n=10  
Therefore, 210 is the 10th term.
 
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