1/4x+1/4x+2+20＝x求解

1/4x+1/4x+2+20＝x求解 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11=17.7这个方程怎么样求解? (求解、x+5)/(x-1)-(3x-3)/(x+5)=(8x+28)/(x^2+4x-5)-2 4(7x-1)-6(5x+1)＝24-3(3x+2)求解 4x²-4x+1=0 求解 x 2x^2-1=4x求解方程谢谢 4x²-2x-1=0 求解 不定积分∫xdx/(1+x^2+x^4)求解! 求解∫(1/(x^2-4x))dx 2分之1X-25%X=4 求解 求解∫1/(cos^4(x)sin^2(x))dx 求解5x平方减1等于4x 5x-1＝4x 求极限值,lim {(x^2-2x+4)/(x^2-3x-1)}^(2x-1)求解!(x趋于无穷) 求解不等式 -3x²+5x-4>0 x(1-x)>x(2x-3)+1 x-1/2x+1/4x+1/7x=5求解 求解一元二次方程：(x-3)(x-3)=4(2x+1)(2x+1) 求解方程(x-1)/(x²-5x+6)+(x-2)/(x²-4x+3)=(x-3)/(x²-3x+2) 求解x^4-x^3-4x^2-2x