Recent content by osirvics

  1. osirvics

    Arithmetic Progression: Find Common Difference with Given First Term and Ratio

    Okay, thanks. Yes, tn = a + (n – 1) d. but i don't know how to implement it. this statement "the ratio of the 7th term to the 9th term is 5:8" is confusing me.
  2. osirvics

    Arithmetic Progression: Find Common Difference with Given First Term and Ratio

    Homework Statement The first term of an a.p is -8, the ratio of the 7th term to the 9th term is 5:8. what is the common difference of the progression? Homework EquationsThe Attempt at a Solution I've tried... it confuses me. Can anyone give me some hints or tips...?