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F(x)<4 | F(X)=2LOG(3X-1)+2 F(X)<4 DF= <1/3, ->> F(X)=4 => 2LOG(3X-1)+2=4 2LOG(3X-1)=2 3X-1=2^2 3X-1=4 3X=5 X=1 2/3 1/3<X<1 2/3 | image tagged in gifs | made w/ Imgflip video-to-gif maker