What is the common difference of an A.P
Arithmetic Progressions (10)What is the common difference of an A.P. in which a21 - a7 = 84 ?
Answer
a21 - a7 = 84
(a + 20d) - (a + 6d) = 84
14d = 84
d = 6
- Exam Year: 2017
Related Questions
- Find the sum of first 25 terms of the A.P.
- The sum of four consecutive numbers in an AP is 32 and the ratio of the product of the first and the last term to the product of two middle terms
- If the ratio of the sum of the first n terms of two A.Ps is (7n + 1) : (4n + 27)
- The first term of an A.P. is 5, the last term is 45 and the sum of all its terms is 400
- Which term of the Arithmetic Progression -7, -12, -17, -22, ... will be -82 ?
- Which term of the progression $20, 19 \frac{1}{4},18\frac{1}{2} ,17\frac{3}{4}$... is the first negative term