因式分解:M(X-Y)²-X+Y 求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 说明5&SUP8-1能被20~30(1)因式分解:M(X-Y)²-X+Y (2)求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 (3)
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![因式分解:M(X-Y)²-X+Y 求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 说明5&SUP8-1能被20~30(1)因式分解:M(X-Y)²-X+Y (2)求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 (3)](/uploads/image/z/1348859-11-9.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9AM%28X-Y%29%26sup2%3B-X%2BY+%E6%B1%82%E4%B8%8D%E7%AD%89%E5%BC%8F%EF%BC%883X%2B4%EF%BC%89%EF%BC%883X-4%EF%BC%89%EF%BC%9C9%EF%BC%88X-2%EF%BC%89%EF%BC%88X-3%EF%BC%89%E7%9A%84%E8%87%AA%E7%84%B6%E6%95%B0%E8%A7%A3+%E8%AF%B4%E6%98%8E5%26SUP8-1%E8%83%BD%E8%A2%AB20%7E30%EF%BC%881%EF%BC%89%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9AM%28X-Y%29%26sup2%3B-X%2BY+%EF%BC%882%EF%BC%89%E6%B1%82%E4%B8%8D%E7%AD%89%E5%BC%8F%EF%BC%883X%2B4%EF%BC%89%EF%BC%883X-4%EF%BC%89%EF%BC%9C9%EF%BC%88X-2%EF%BC%89%EF%BC%88X-3%EF%BC%89%E7%9A%84%E8%87%AA%E7%84%B6%E6%95%B0%E8%A7%A3+%EF%BC%883%EF%BC%89)
因式分解:M(X-Y)²-X+Y 求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 说明5&SUP8-1能被20~30(1)因式分解:M(X-Y)²-X+Y (2)求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 (3)
因式分解:M(X-Y)²-X+Y 求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 说明5&SUP8-1能被20~30
(1)因式分解:M(X-Y)²-X+Y (2)求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 (3)说明5&SUP8-1能被20~30之间的两个整数整除
因式分解:M(X-Y)²-X+Y 求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 说明5&SUP8-1能被20~30(1)因式分解:M(X-Y)²-X+Y (2)求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解 (3)
(1)因式分解M(X-Y)²-X+Y =M(x+y)(x-Y)-(x-Y)=(Mx+MY-1)(X-Y)
(2)(3X+4)(3X-4)<9(X-2)(X-3)
9X^2-16
因式分
M(X-Y)²-X+Y
=M(X-Y)²-(X-Y)
=(X-Y)(MX-MY-1)
求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解
9X²-16<9X²-45X+54
45X<60
X<4/3
∴不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解是:...
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因式分
M(X-Y)²-X+Y
=M(X-Y)²-(X-Y)
=(X-Y)(MX-MY-1)
求不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解
9X²-16<9X²-45X+54
45X<60
X<4/3
∴不等式(3X+4)(3X-4)<9(X-2)(X-3)的自然数解是:0 1
说明5^8-1能被20~30之间的两个整数整除
∵5^8-1
=(5^4+1)(5^4-1)
=(5^4+1)(5^2+1)(5^2-1)
=626×26×24
∴5^8-1能被20~30之间的两个整数24和26整除
收起
(1)、(X-Y)(MX-MY-1)
(2)、9X^2-16<9X^2-45X+54
45X<70
X<1.556
所以 X=1,0
x+y(mx+my)