小数奥数网xx(x +1)x(x+ 2)x(x +3)=360怎样算?
小数奥数网xx(x +1)x(x+ 2)x(x +3)=360怎样算?
小数奥数网xx(x +1)x(x+ 2)x(x +3)=360怎样算?
小数奥数网xx(x +1)x(x+ 2)x(x +3)=360怎样算?
x和乘号混淆了
360=2X2X2X3X3X5
2X2=4
2X3=6
36=3X4X5X6
所以x=3
x×(x +1)×(x+ 2)×(x +3) = 360 = 3×4×5×6
x = 3
x(x +1)(x+ 2)(x +3)=360
x(x+3)=x²+3x+1-1
(x +1)(x+ 2)=x²+3x+1+1
(x²+3x+1-1)(x²+3x+1-1)=(x²+3x+1)²-1=360
x²+3x+1=361=19²
x²+3x+1=19或x...
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x(x +1)(x+ 2)(x +3)=360
x(x+3)=x²+3x+1-1
(x +1)(x+ 2)=x²+3x+1+1
(x²+3x+1-1)(x²+3x+1-1)=(x²+3x+1)²-1=360
x²+3x+1=361=19²
x²+3x+1=19或x²+3x+1=-19
解x²+3x+1=19 x²+3x-18=0 (x-3)(x+6)=0 x=3或x=-6
解x²+3x+1=-19 x²+3x+20=0 (x+1.5)²=-10+2.25<0 无实数解
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xx(x +1)x(x+ 2)x(x +3)=360
360分解成2×2×2×3×3×5=(2×2)×(2×3)×3×5=3×4×5×6
X*(X+1)*(X+2)*(X+3)=360
X*(X+3)*(X+1)*(X+2)=360
(X²+3X)*(X²+3X+2)=360
设X²+3X=T
T*(T+2)=360
T²+2T=360
T²+2T+1=361
(T+1)²=361
T+1=19
T=18
X²+3X=18
X=3
你这个里面的x是字母还是符号?有什么问题直接呼我百度,我随时可以现场教你。