Question

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Answer 1

Answer:

7. First row= 23

Second row =21

Last row = 5

So as series is in the following way

23,21,.........................,5

a=23 D= -2 an= 5

an = a+(n-1)d. an = 23+(n - 1)-2

5-23 =(n-1)-2

-18 =(n-1)-2

-18/-2 =n-1

9 =n-1

9+1 =n

N =10

8.the 17th term of an A.P exceeds its 10th term by 7 . d = ? ⇒d = 7/7 = 1 . Therefore , common difference = 1

Step-by-step explanation: