2x 2 x x 1.5 4. (-X+1)^5/4 < X^4/5 + 1. 4^X-4=1/2. 1/(X-2)(X+4)+3/X(X+2)=4/5. 2x-(3x-4(x-2)+1). 4x2+4x+1/x2-4 4x+2/6x-12. ((-X+1)^-1 - ((-X+4)^-1)^2 =<|X^2+6x|/. 2x-1/6-3x +2x+1/2x-4 -x+3/6x-12. X-4/X-2-X/2-X. 2^X+2^1-X=3. X-1<3x+2. 5x^2=3x+2. 2^X=3^X