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△x1+[(△x1-△x2)/(x2-x1)](x-x1) △x1-[(△x2-△x1)/(x2-x1)](x-x1) △x1+[(△x2-△x1)/(x2-x1)](x-x1) △x1+[(△x2-△x1)/(x2-x1)](x1-x)
10X10 B、1/2X1/2 256x256 1X1
x2﹣1=(x﹣1)2 x2+2x﹣1=(x+1)2 2x2﹣2=2(x+1)(x﹣1) x2﹣6x+9=x(x﹣6)+9
x1=1 x2=-2 x1=-1 x2=2 x1=-1 x2=-2 x1=1 x2=2
x1<1<x2<2 x1<1<2<x2 x2<x1<1 2<x1<x2
1<x1<2,x1+x2<2 1<x1<2,x1+x2<1 x1>1,x1+x2<2 x1>1,x1+x2<1
x1=1,x2=2 x1=﹣1,x2=﹣2 x1=1,x2=﹣2 x1=﹣1,x2=2
f(x)=x2+2x+1 f(x)=x2﹣2x+1 f(x)=x2+2x﹣1 f(x)=x2﹣2x﹣1
x2﹣2x﹣1=(x﹣1)2 2x2﹣2=2(x+1)(x﹣1) x2y﹣xy=y(x2﹣x) x2﹣2x+2=(x﹣1)2+1
在斜面上由静止匀加速滑下x1后,又匀减速地在平面上滑过x2后停下,测得x2=2x1,则物体在斜面上的加速度a1与在平面上的加速度a2的大小关系为( ) A.a1=a2 a1=2a2 a1=a2 a1=4a2
2x2﹣2=2(x+1)(x﹣1) x2+2x﹣1=(x﹣1)2 x2+1=(x+1)2 x2﹣x+2=x(x﹣1)+2
x1=2 y1=2 x2=2 y2=1 x1=2 y1=2 x2=2 y2=2 x1=2 y1=1 x2=2 y2=2 x1=2 y1=1 x2=2 y2=1
f(x﹣1)=2x+2(0≤x≤2) f(x﹣1)=﹣2x+1(2≤x≤4) f(x﹣1)=2x﹣2(0≤x≤2) f(x﹣1)=2x﹣1(2≤x≤4)
y=2x y=-2x+5 y=x2+2x1
f(x-1)=2x+2(0≤x≤2) f(x-1)=2x-1(2≤x≤4) f(x-1)=2x-2(0≤x≤2) f(x-1)=-2x+1(2≤x≤4)
8198s=(x-u)2x1=x+100,u1=u+100x1-u1=x-u,s1=s 8189x2=(1+0.1)x,u2=(1+0.1)u,x2-u2=1.1x-1.1u=1.1(x-u),s2=1.12s 9198 以上都不对