若2^x÷4^2=32,则x=

若x(3x-4)+2x(x+7)=5x(x-7)+90,则x= 化简 [3x/(x+2)-x/(x=2)]÷x/(x^2-4)化简 [3x/(x+2)-x/(x-2)]÷x/(x^2-4 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若x+1/x=4,则x^2/（x^4+x^2+1）= 若1/x-x=3,则x^2/x^4+x^2+1=( ) 若1/x+x=3,则x^2/x^4+x^2+1=____ 1.当x≠——时,式子(x-1)(x+1)+1 / x的三次方+5x = x / x²+5成立2.若|x-1| / (x-1)² = - 1/x-1 则x____3.先化简再求值 2/ 4-4x+x² ÷ (x+3) * x-2 / x+3 其中x=2+根号2 2x(7-3x)+5x(2x+1)=x(4x-3)+32 若2,x,x+4成等比数列,则x= x=1-x/2+x/4-x/8+x/16-x/32 若x等于它的倒数则(x-1)(x+2)/x-1÷x^2-9/x+3= 若x等于它的倒数则(x-1)(x+2)/x-1÷x^2-9/x+3= 若(x^2+x+1)/x=4,则x^2/(3x^4-5x^2+3)= 若(x²+x-4)(x²+x+2)+9=4,则x²+x=_________ 若(x²+x-4)(x²+x+2)+9=4,则x²+x=? 若f(x)=x(x-1)(x-2)(x-3)(x-4),则f'(0)=? 若函数f(x)满足f(x)+2f(1/x)=5x+4/x,则f(x)= 若4x-1/(x+2)(x-1)=m/(x+2)+x/(x-1)则m等于