SubArea: Introduction to sequencesLevel: BProject ID: 2010000703Source Problem: 9000063806Accepted: 0Clonable: 1Easy: 0Consider the sequence \(2a_{n} = a_{n+1} - a_{n-1}\) with \(a_{3} = 2\) and \(a_{4} = 5\). Find \(a_{2} - a_{1}\).\( 1\)\(4\)\(-20\)\(-25\)
