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
What is the common difference of an A.P. in which a21 - a7 = 84 ?
a21 - a7 = 84
(a + 20d) - (a + 6d) = 84
14d = 84
d = 6