x/3×18=150/54
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
计算1/[x(x+3)]+1/[(x+3)(x+6)]+.+1/[(x+15)(x+18)]=?
1/x(x+3)+1/(x+3)(x+6)+1/(x+6)(x+9)=3/2x+18
X(x+3)分之一+(X+3)(X+6)分之一+(X+6)(X+9)分之一=2x+18分之三
(X-X*20%-18-(X-X*20%-18)*10%=X*1/2-3(过程)
3X-18=13.2 1.5X-X=6 4X+1.2X=26
x/(x+3)-x/(3-x)=18/(x平方-9)
(x-3)(x-2)+18=(x+9)(x+1),X是多少啊?
X+120%X=44 30%X-18=54
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
3X-54=X+54
-3X²-3X=18 X=?