In an AP, if the common difference (d) = -4, and the seventh term
Arithmetic Progressions (10)In an AP, if the common difference (d) = -4, and the seventh term (a7) is 4, then find the first term.
Answer
a + 6(-4) = 4
a = 28
Exam Year:
2018
Related Questions
- Find the sum of first 8 multiples of 3
- 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
- In an A.P, if $ S_{n} = 3n^2 + 5n $ and $ a_k = 164 $
- The first term of an A.P. is 5, the last term is 45 and the sum of all its terms is 400
- $ \frac{1}{a},\frac{3 - a}{3a},\frac{3 - 2a}{3a} ... (a \ne 0)$
- How many terms of the Arithmetic Progression 45, 39, 33, ... must be taken so that their sum is 180