Which of these are arithmetic progressions and why?
(iii) `-1, -3, -5, -7,`.......

Which of these are arithmetic progressions and why? (i) 2,3,5,7,8,10,15, ......

Which of these are arithmetic progressions and why? (ii) 2,5,7,0,12,15,....

Take any Arithmetic progression.

Write 3 more Arithmetic Progressions.

In which of the following situations, does the list of numbers involved make an arithmetic progression, and why? (iii) The cost of digging a well, after every metre of digging, when it costs Rs. 150 for the first metre and rises by Rs. 50 for each subsequent metre.

In which of the following situations, does the list of numbers involved make an arithmetic progression, and why? (ii) The amount of air present in a cylinder when a vacuum pump removes 1//4^(th) of the air remaining in the cylinder at a time.

In which of the following situations, does the list of numbers involved make an arithmetic progression, and why? (iv) The amount of money in the account every year, when Rs. 10000 is deposited at compound intrest at 8% per annum.

Find the 7^(th) term from the end of the Arithmetic Progression. 7, 10, 13, ……, 184.

Find the sum to indicated number of terms in each of the geometric progressions in x^3,x^5,x^(7), .........n terms (if x ne pm 1 )