A geometric sequence has the explicit formula an = (-2) x 3^n- 1. What is the 4th term?

-54

Step-by-step explanation:

Please write this sequence in the following form:  a(n) = (-2)*3^(n- 1)

Then a(1) = -2*3^0  =  -2

         a(2) = -2*3^(2 - 1) = -6

          a(3) = -2*3^(3 - 1) = -2*9 = -18

          a(4) = -2*3^(4-1) = -2*27 = -54

(0.2)+(-8)=0.3+-3+0.3m is the equation i guess? ?

step-by-step explanation: