Advertisements
Advertisements
प्रश्न
If 7 times the seventh term of the AP is equal to 5 times the fifth term, then find the value of its 12th term.
Advertisements
उत्तर
7(a + 6d) = 5(a + 4d)
⇒ 2a + 22d = 0
⇒ a + 11d = 0
⇒ t12 = 0
APPEARS IN
संबंधित प्रश्न
An A.P. consists of 50 terms of which 3rd term is 12 and the last term is 106. Find the 29th term of the A.P.
Find the sum of the first 25 terms of an A.P. whose nth term is given by an = 7 − 3n
Is 184 a term of the AP 3, 7, 11, 15, ...?
Is –150 a term of the AP 11, 8, 5, 2, ...?
The fourth term of an A.P. is 11. The sum of the fifth and seventh terms of the A.P. is 34. Find its common difference.
Simplify `sqrt(50)`
A man is employed to count Rs 10710. He counts at the rate of Rs 180 per minute for half an hour. After this he counts at the rate of Rs 3 less every minute than the preceding minute. Find the time taken by him to count the entire amount.
If the sum of n terms of an A.P. is 2n2 + 5n, then its nth term is
The first three terms of an A.P. respectively are 3y − 1, 3y + 5 and 5y + 1. Then, y equals
Find the sum of first 17 terms of an AP whose 4th and 9th terms are –15 and –30 respectively.
