Question

10. Which term of the A.P. 3, 8, 13, 18, is 7

8 ?
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Answer 1

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Answer 2

Answer:

16th term is 78

Explanation:

given A.P is  

             3, 8, 13, 18,...

First term (a)=3

Common difference(d)=8-3=5

We know that

                          tₙ=a+(n-1)d

                           78=3+(n-1)5

                            78=3+5n-5

                                78=5n-2

                                   5n=80

                                      n=16

Hence 16th term is 78

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