30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1
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!)+.
【1】2x+2.5x+1.5x=5
5x+6x(1.5x)=44.8解方程
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x=4x=254 5x-x=180 3x+x=16 4x-2x=28 15x-11x=12.8 (12+12*1.5)x
5x+3.2x=32.8. 7.9x2-1.5x=5.3. 5x+2.4×1
(3x-1)/0.5=(4-x)/0.3+(3x+5)/1.5 x得多少?
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(1)1000*1.5^5-1.5x^4-1.5x^3-1.5x^2-1.5x-x>=2000
4×2.6-5x=8.4 17.28-4x=5.6x 2(4x-3.5)=11 4.3x-x+1.5x=9.6 4到解方
4x-x=24 1.5x-x=1 3.2x-1=63 6.6x-5x=8