What is the sum of the geometric series

Answer:40Step-by-step explanation:we need the sum of the first 4 terms of this GS= (-2)(-3)^0 + (-2)(-3)^(2-1) + (-2)(-3)^(3-1) + (-2)(-3)^(4-1)= -2( 1 + -3 + 9 + -27)= 2 * -20= 40