How To Solve Arithmetic Series 12 April 2018 0 Input Arithmetic series Arithmetic series sum_(k=1)^n(a_1 + (k – 1) d) = n a_1 + 1/2 n ((n – 1) d) Related posts: Quadratic Equasions How To Solve Quadratic Formula Is 289 A Perfect Square How To Solve An Arithmetic Sequence How To Solve Arithmetic Sequences How To Solve Geometric Series How To Solve A Geometric Series Geometric Series Solver