Which represents the explicit formula for the geometric sequence gn=12×3^n-1 in function form? a. f(n)=1/3*4^n
b. f(n)=1/4*3^n
c. f(n)=4*3^n
d. f(n)=36*3^n

How is the equation of this circle written in standard form? x2 + y2 - 6x + 14y = 142 a) (x - 3)2 + (y + 7)2 = 200 b) (x+ 3)2 + (y - 7)2 = 200 (x - 6)2 + (y + 14)2 = 142 d) (x+6)2 + (y- 14)2 = 142