Q3 of 167 Page 19

Insert 7 A.M.s between 2 and 17.

Let A1, A2, A3, A4, A5, A6, A7 be the 7 AM Between 2 And 17


Then, 2, A1, A2, A3, A4, A5, A6, A7, 17 are in AP


We know,


An = a + (n - 1)d


A9 = 17 = 2 + (9 - 1)d



hence,









More from this chapter

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1

Find the A.M. between:

(i) 7 and 13 (ii) 12 and - 8 (iii) (x - y) and (x + y)

 2

Insert 4 A.M.s between 4 and 19.

 4

Insert six A.M.s between 15 and - 13.

 5

There are n A.M.s between 3 and 17. The ratio of the last mean to the first mean is 3 : 1. Find the value of n.