Summing an Arithmetic Progression
Algebra
Level
1
The formula for the sum of the first \(n\) terms of an arithmetic progression is given by \(S_n = \dfrac{n(2a_1 + (n-1)d)}2 \).
Find the sum of the first 6 terms when \(a_1 =-2\) and \(d= 3 \).
by
Hill Taeudomkul