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答案:
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1.1 x→0
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2.对于 int x, y;语句 if (x < 0) y = -1; else if (x==0) y = 0; else y = 1;等价于
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3.29.求1=fu(1 x)dx(>0
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4.1 1 1 1 1
0 1 1 1 1
0 0 1 1 1
0 0 0 1 1
0 0 0 0 1
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5.For the sequence X=(x(1) ,x(2),…, x(n),if Z stands for the sequence of even generated by adjacent neighbor
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6.f(x)=A、[ 1 8 , 1 3 )B、[0, 1 3 ]C、(0, 1 3 )D、(-∞, 1 3 ]
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7.3.设F(X是f(x)的原函数,且F(x)·f(x)=2(1)2.F(0)=1(F(x)>0)求F(x)及fx
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8.(集合013)设集合A={x|x2–4≤0},B={x|2x+a≤0},且A∩B={x|–2≤x≤1},则a=()
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9.1 1 1 1 10 1 1 1 10 0 1 1 10 0 0 1 10 0 0 0 1
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10.13、设y=y(x)满足y" 2y y=0,且y(0)=0,y(0)=1,则y(x)dx