Question

which term of an ap : 21 42 63 84...... is 210 ​

Answer 1

Step-by-step explanation:

a=21

d=21

an=210

an=a+(n-1)d

210=21+(n-1)21

189/21=n-1

9=n-1

n=10

210 is the 10th term of the AP

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Answer 2

Please refer the given answer :