X*15 X 12 X 10=1365怎么解出来答案的
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X/X×(1/12+1/15)×X×(1/12-1/15)=60X/X×9/60×X×1/60=60X/9X/60×X/60=60X×60/9X×X/60=6060/9×X/60=60X/9=60X=
3x=15,x=5,5+2y=19,y=7,y-x=2
(两边同时×60)4x+5x+6x=1365×6015x=1365×60(两边都÷15)x=1365×4
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550120x=550x=55/12=4.583
4x/60+5x/60+6x/60=136515x/60=1365x=1365×4x=5460
(X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问:请问X(X+2)=99解为什么就等于9了呢没看懂再答:换成算术法你就明
x(x^2-6x-9)-x(x^2-8x-15)+2x(3-x)=x^3-6x^2-9x-x^3+8x^2+15x+6x-2x^2=12x=36
X(X^2-6X-9)-X(X^2-8X-15)+2X(3-X)=X^3-6X^2-9X-X^3+8X^2+15X+6X-2X^2=12x带入X=1/3原式=12*1/3=4
同时乘6060×(x/15+x/12+x/10)=1365×604x+5x+6x=8190015x=81900x=81900÷15x=5460很高兴为您解答,【学习宝典】团队为您答题.请点击下面的【选
x/2(1/1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)=1x/2*10/11=110x=22x=11/5这回的方法是你想要的了吧
x^4-4x^3-4x^2+15x+18=0x^4-3x^3-x^3+3x^2-7x^2+21x-6x+18=0(x-3)(x^3-x^2-7x-6)=0x1=3x2=3.49449283705542
设x1=4-√3,x2=4+√3,是方程X^2-8X+13=0的两根所以X1^2-8X1+15=2X^4-6X^3-2X^2+18X+23=(X+1)^2*(X^2-8X+13)+10=10所以原式=
1/[x(x+3)]+1/[(x+3)(x+6)]+.+1/[(x+15)(x+18)]=1/3[1/x-1/(x+3)]+[1/(x+3)-1/(x+6)]+.+[1/(x+15)-1/(x+18)
中间是乘号吗?750/x²=15/x显然x不等于0则两边乘x²750=15xx=50
∵(x^4-4x^2+5x-15)/[(x^2+1)(x-2)]=[(x^4+x²-5x²-5)+(5x-10)]/[(x²+1)(x-2)]=[x²(x&su
再问:15=3.5X一0.5XX=?再答:
2x等于x+15x等于15
x/15+x/12+x/10=1365(1/15+1/12+1/10)x=1365x/4=1365x=5460
130%x+x=4.61.3x+x=4.62.3x=4.6x=2x÷50%=10x=10乘2x=20x/9-x/15=16%x(1/9-1/15)=16/100x(5/45-3/45)=4/25x=4