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y = 1 - 2 cos x 的定义域是_____...

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自动站观测  人工观测  全月数据缺测  无任何意义  
If x<3 * y And x>y Then y=x^3  If x<3 * y And x>y Then y=x3  If x<3 * y:x>y Then y=x^3  If x<3 * y And x>y Then y=x* *3  
Y1RQY2RQY3Y4Y5Y6Y7  Y1aY2aY3Y4Y5Y6Y7  Y1aY2Y3Y4Y5Y6aY7  Y1RQY2Y3Y4Y5Y6RQY7  
If X < 3 * Y And X > Y Then Y = X ^ 3  If X < 3 * Y And X > Y Then Y = X3  If X < 3 * Y : X > Y Then Y = X ^ 3  If X < 3 * Y And X > Y Then Y = X * * 3  
y"'-y"-y'+y=0  y"'+y"-y'-y=0  y"'-6y"+11y'-6y=0  y"'-2y"-y'+2y=0  
Y1-RQ-Y2,RQ-Y3-Y4,Y5-Y6-Y7  Y1-a-Y2,a-Y3-Y4,Y5-Y6-Y7  Y1-a-Y2,Y3-Y4-Y5,a-Y6-Y7  Y1-RQ-Y2,Y3-Y4-Y5,QR-Y6-Y7  
(-3,y1),  (-2,y2),  (-1,y3)三点都在函数y=-的图象上,则y1、y2、y3的大小关系是(   ). A.y1>y2>y3  B.y1<y2<y3  C.y1=y2=y3    y1<y3<y2  
IfX<3*Y And X>Y Then Y=X^3  IfX<3*Y And X>Y Then Y=X3  IfX<3*Y:X>Y Then Y=X^3  IfX<3*Y And X>Y Then Y=X**3  
y"'-y"-y'-y=0.  y"'+y"-y'-y=0.  y"'-6y"+11y'-6y=0.  y"'-2y"-3y'+2y=0.  
y"’-y"-y’+y=0.  y"’+y"-y’-y=0.  y"’-6y"+11y’-6y=0.  y"’-2y"-y’+2y=0.  
y"'-y"-y'+y=0  y"'+y"-y'-y=0  y'"-6y"+11y'-6y=0  y"'-2y"-y'+2y=0  
If x<3*y And x>y Then y=x^3  If x<3*y And x>y Then y=3x  If x<3*y:x>y Then y=x^3  If x<3*y And x>y Then y==x* *3  
Y1RQY2RQY3Y4Y5Y6Y7  Y1aY2aY3Y4Y5Y6Y7  Y1aY2Y3Y4Y5Y6aY7  Y1RQY2Y3Y4Y5Y6RQY7  
Y1RQY2RQY3Y4Y5Y6Y7  Y1aY2aY3Y4Y5Y6Y7  Y1aY2Y3Y4Y5Y6aY7  Y1RQY2Y3Y4Y5Y6RQY7  
c1y1+c2y2  c1Y1(x)+c2Y2(x)  c1y1+c2y2+Y1(x)  c1y1+c2y2+Y1(x)+Y2(x)  
Y1-RQ-Y2,RQ-Y3-Y4,Y5-Y6-Y7  Y1-a-Y2,a-Y3-Y4,Y5-Y6-Y7  Y1-a-Y2,Y3-Y4-Y5,a-Y6-Y7  Y1-RQ-Y2,Y3-Y4-Y5,Y6-RQ-Y7  
y=c(y1-y2)  y=c(y1+y2)  y=y1+c(y1+y2)  y=y1+c(y1-y2)  
x=x+y y=y+x x=x+y  x=x+y y=x-y x=x-y  x=x+y y=y-x x=x-y  x=x-y y=x-y x=y-x  
笑靥 yǎn 颐和园yí 迤逦 yǐ lǐ    旖旎 yǐ nǐ 后裔 yì 揶揄 yé yú    造诣 yì 友谊 yì 应承 yìng    荫凉 yìn 应届 yīng 肄业 yì  
y'"-y"-y'+y=0.  y'"+y"-y'-y=0.  y'"-6y"+11y'-6y=0.  y'"-2y"-y'+2y=0.  

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