Arithmetic progressions 3

Algebra Level 3

An arithmetic progression has a positive common difference. The ratio of the difference of the 4th and 8th term to the 15th term is \(\dfrac{4}{15}\) and the square of the difference of the 4th and the 1st term is 225. Which term of the series is 2015?

×

Problem Loading...

Note Loading...

Set Loading...