5x-2.1×3=5.2 求x

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!)+. 5x-2.1×3=5.2 求x x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x x*x+3x+1 =5 求x 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 1.(x*2-3x+3)/(x*2-3x+2)-(x*2-5x+7)/(x*2-5x+6)-1/(x*2-4x+3)2.1/x(x+1)+2/(x+1)(x+3)+3/(x+3)(x+6) 3.已知：x*2-3x+1=0,求x*2+1/x*2. (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? (x-2)(x*x-6x-9)=x(x-5)(x-3),求6x的算术平方根 3^x=2^x,求x.5^(x-1)·10^3x=8^x求x 如果1+x+x^2+x^3=0,求x+x^2+X^3+x^4+x^5+x^6+x^7+x^8的值, 已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10| 已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) (x+2)(x-1)+(x+3)(x+1)=x·x-1 求x (5x-4)(2x+5)(3x-6)(2x-4)=(2x-4)(2x+5)·0.5 求x 5-x=5-3x求x为几 (3x-5)*(4x-3)=80 求x x^5-3x+6=56 求x 5x-3x=1 求x等于几? 3X的平方+9X=5 求X