2/5x-8=20-3/4x 求x等于2/5x-8=20-3/4x求x等于

2/5x-8=20-3/4x 求x等于2/5x-8=20-3/4x求x等于 (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? (x-1)(x-2)(x-3)(x-4)=0,求x等于多少, 1）y=x^2+3x-4:x^2+x+2 （2）y=x^2-5x+4:x^2-2x-8,x大于等于2小于等于3.求值域, （1）y=x^2+3x-4:x^2+x+2 （2）y=x^2-5x+4:x^2-2x-8,x大于等于2小于等于3.求值域 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) 3x+1=5x+2=7x+4=13x+6 求x等于多少? x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X 当X等于7/8时,求(X-5)(X-5)+(X+2)(X-2)-2(X+3)(X-4)+1 2(x-3)(x+5)-(2x-1)(x+7)小于等于4求x那么x是什么 logx(27)=6,求x等于多少?logx(27)=6,求x等于多少?log64(x)=2/3(意思是3分之2),求x等于多少?log2[log5(x)]=0,求x等于多少?[log3(lgx)]=1,求x等于多少?logx(8)=3/2,求x等于多少?5^lgx=25,求x等于多少? *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 设x= -5/2,求6x+(x/x-2 - x/x+2)/4x/x^4-2x^3+8x-16的值 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少