0.01^x=10000,则X=_____,若3^(X+1)*5^(X+1)=15^(2X-3),则X=_____

若1/x+x=3,则x^2/x^4+x^2+1=____ 若x>2,则|x-2|=____ 2.3x+7.7x=(____+_____)×____ （____-2)(3x+____)=4-9x² 若x*x+y*y-4x+16y+13=0 ,则x=____ y=____ 如果(x-2)(x-k)=x.x+px-6则k=___p=____ 若(x-4)(x+a)=x^2-2x+b,则a+b=____. 若x+1/x=5,则（x-1/x）²= ____步骤 (x^2+1)/x=3,则(x^4+1)/x^2=____? 已知x^2-x-1=0,则-x^3+2x^2+2004=____ 填空：x²+4x+____ =(x+____)²x²-5x+____ =(x-____)²x²_____+9=(x____)² 若(x+3)(x-4)=ax²+bx+c 则a=____ b=____ c=____ 求导数 c'=___ (x^n)'=____ (sin x)'=____ (cos x)'=____ (ln x)'=____ (loga x)'=____ (e^x)'=____(a^x)'=____ 0____{x|x平方=2x} 填符号 {1}____{x|x平方=x} 填符号 已知（2x+5y-4）+|x+5y-7|=0,则x=____,y=____. 方程x+3y=6中,x,y互为相反数,则x=____,y=____ 已知x ^2+9y ^2-2x+12y+5=0,则x=____,y=____.