diketahui f(x)=3log (2x+1),g(x) = 5x .tentukan x jika (f lingkaran g) (x)=4

F(x)=3 log 2x+1
g(x)=5x

F0g(x) = f(g(x))
=f(5x)
=3 log 2(5x)+1
=3 log 10x +1
=3 log 10.4+1
=3 log 40+1
=3 log 41
=4,83