Which term of the A.P: 21,42,63,84,... is 210?
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Which term of the A.P: 21,42,63,84,... is 210?
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Answer:
Let nth term be 210
Here, a=21 and d=21
Therefore,
tn=210
tn=a+(n-1) d..... (Formula)
210=21+(n-1) 21
210-21=21n-21
189=21n-21
189+21=21n
210=21n
n=210/21
n=10
Therefore,
10th term of an AP is 210.
Answer:
Step-by-step explanation:
Let nth term be 210
Here, a=21 and d=21
Therefore,
tn=210
tn=a+(n-1) d..... (Formula)
210=21+(n-1) 21
210-21=21n-21
189=21n-21
189+21=21n
210=21n
n=210/21
n=10
Therefore,
10th term of an AP is 210.
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