Advertisements
Advertisements
प्रश्न
In which of the following situations, do the lists of numbers involved form an AP? Give reasons for your answers.
The fee charged every month by a school from Classes I to XII, when the monthly fee for Class I is Rs 250, and it increases by Rs 50 for the next higher class.
उत्तर
The fee charged month by a school from I to XII is
250, (250 + 50), (250 + 2 × 50), (250 + 3 × 50),...
i.e., 250, 300, 350, 400,...
Which form an AP, with common difference (d) = 300 – 250 = 50
APPEARS IN
संबंधित प्रश्न
Find n if the nth term of the following A.P. is 68
5, 8, 11, 14, ..........
Find the common difference and write the next four terms of each of the following arithmetic progressions:
`-1, 1/4, 3/2 .....`
Which of the following sequences are arithmetic progressions . For those which are arithmetic progressions, find out the common difference.
`1/2, 1/4, 1/6, 1/8 ......`
Find the 10th term of the A.P. −40, −15, 10, 35, ...
Find 8th term of the A.P. 117, 104, 91, 78, ...
There is an auditorium with 27 rows of seats. There are 20 seats in the first row, 22 seats in the second row, 24 seats in the third row and so on. Find the number of seats in the 15th row and also find how many total seats are there in the auditorium?
Check whether the following sequence is in A.P.
1, –1, 1, –1, 1, –1, …
Merry got a job with salary ₹ 15000 per month. If her salary increases by ₹ 100 per month, how much would be her salary after 20 months?
In an A.P. t10 = 57 and t15 = 87, then find t21
Which of the following form an AP? Justify your answer.
0, 2, 0, 2,...
