Chapter 5 Arithmetic Progressions Ex 5.4

Chapter 5 Arithmetic Progressions Ex 5.4

Question 1.
Which term of the AP: 121, 117. 113, ….., is its first negative term?
Solution:

Question 2.
The sum of the third term and the seventh term of an AP is 6 and their product is 8. Fibd the sum of first sixteen terms of the AP?
Solution:

Question 3.

Solution:

Question 4.
The houses of a row are numbered consecutively from 1 to 49. Show that there is value of x such that the sum of the numbers of the houses preceding the house numbered x is equal to the sum of the numbers of the houses following it. Find this value of x.
Solution:

Question 5.

Solution: