Question 681881
Use a graphing calculator to get


{{{ drawing(500, 500, -10, 10, -10, 10,
 graph( 500, 500, -10, 10, -10, 10,0,4*(1/6)^(x+2))

)}}}


Note: the green curve gets closer and closer to the x-axis, but it will never cross or touch it (regardless of how it looks above)