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y = 1 + cos x ( x ∈ [ ...

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y3<y2<y1   y2<y3<y1    y1<y2<y3   y1<y3<y2  
if(x>0)y=1   else if(x<0)y=-1;   else y=O;  if(  if(x>0)y=1;  else if(x<0)y=-1;  y=-1;  if(  if(x>0)y=1;  else if(x==0)y=0;  else y=-1;  y=0;  if(x>=0)  if(x>0)y=1;  else y=-1;  
Y1-Y988  Y1-Y998  Y1-Y898  Y1-Y999  
(-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  
c1y1+c2y2+y3  c1y1+c2y2-(c1+c3)y3  c1y1+c2y2-(1-c1-c2)y3  c1y1+c2y2+(1-c1-c2)y3  
x=1,y=1 x=2,y=2  x=2,y=1 x=1,y=1  x=1,y=1 x=1,y=1  x=2,y=1 x=2,y=1  
Y1~Y098  Y1~Y198  Y1~Y298  Y1~Y498  
if(x>0)y=1    else if(x<0)y=-1;    else y=O;  if(x)   if(x>0)y=1;    else if(x<0)y=-1;  y=-1;   if(x)   if(x>0)y=1;   else if(x==0)y=0;   else y=-1;  y=0;   if(x>=0)   if(x>0)y=1;   else y=-1;  
if(x>0)y=1; else if(x<0)y=-1; else y=0; else y=0;  if( if(x>0)y=1; else if(x<0)y=-1;  y=-1; if( if(x>0)y=1; else if(x==0)y=0; else y=-1;  y=0; if(x>=0) if(x>0)y=1; else y=-1:  
y1>y2>y3  y1>y3>y2   y2>y3>y1  y3>y2>y1  
(x+y+1)(x-y-1)  (x+y-1)(x-y-1)  (x+y-1)(x-y+1)  (x-y+1)(x+y+1)  
c1y1+c2y2  c1Y1(x)+c2Y2(x)  c1y1+c2y2+Y1(x)  c1y1+c2y2+Y1(x)+Y2(x)  
y3<y2<y1   y1<y2<y3   y2<y1<y3   y2<y3<y1  
y=c(y1-y2)  y=c(y1+y2)  y=y1+c(y1+y2)  y=y1+c(y1-y2)  
if(x>0)y=1    else if(x<0)y=-1;    else y=O;  if(x)   if(x>0)y=1;    else if(x<0)y=-1;  y=-1;   if(x)   if(x>0)y=1;   else if(x==0)y=0;   else y=-1;  y=0;   if(x>=0)   if(x>0)y=1;   else y=-1;  
MC(Y1+Y2)=MR1(Y1)=MR2(Y2  MR2(Y2)>MC(Y1+Y2)=MR1(Y1)  MR1(Y1)>MC(Y1+Y2)=MR2(Y2)  MR1(Y1)=MR2(Y2)=MC(Y1+Y2)  
x=1,y=1
x=2,y=2  
x=2,y=1
x=1,y=1  
x=1,y=1
x=1,y=1  
x=2,y=1
x=2,y=1  

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