9000063802 Level: BWe are given the sequence \(\left (an + b\right )_{n=1}^{\infty }\). This sequence satisfies \(a_{4} - a_{1} = 6\). Use this information to find \(a\).\(a = 2\)\(a = -2\)\(a = -1\)\(a = 1\)
9000063806 Level: BConsider the sequence \(a_{n+1} = a_{n} - 2a_{n-1}\) with \(a_{3} = 0\) and \(a_{4} = -16\). Find \(a_{2} - a_{1}\).\(4\)\(16\)\(- 4\)\(8\)