Question

To find the 21st term
in
AP: 3, 10, 17,26,31​

Answer 1

Answer:

143

Step-by-step explanation:

The general term of an A.P. is a+(n-1)*d

Therefore, the general term of 21st term would be a+(21-1)*d

which is, a+20*d

here, a=3 and d(difference of two consecutive terms)= 10-3=7

Thus 21st Term= 3+20*7

                         = 143

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