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¶¨ÒåÓò£ºD(f), ÖµÓò:Z(f).
f(x) x D1 y 2?·Ö¶Îº¯Êý£º g(x) x D2
3?Òþº¯Êý£ºF(x,y)= 0 4.·´º¯Êý£º
y=f(x) T x=$ (y)=f-1(y) y=f1 (x)
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Èô f(X1)V f(X2),
Ôò³Æf(x)ÔÚDÄÚÑϸñµ¥µ÷Ôö¼Ó();
Èô f(X1) > f(X2),
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2. º¯ÊýµÄÆæżÐÔ£ºD(f)¹ØÓÚÔµã¶Ô³Æ
żº¯Êý£ºf(-x)=f(x) Æ溯Êý£ºf(-x)=-f(x)
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y=ta n x , y=cot x y=secx , y=cscx
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y=arctan x, y=arccot x
¢è ¸´ºÏº¯ÊýºÍ³õµÈº¯Êý 1.¸´ºÏº¯Êý£º y=f(u) , u= $ (x)
y=f[? (x)] , x € X
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