题目:
函数f(x)是R上的奇函数,且当x>0时,函数的解析式为f(x)=
(1)求f(-1)的值; (2)求当x<0时,函数的解析式; (3)用定义证明f(x)在(0,+∞)上是减函数. |
答案:
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Wuxi underground line 1 will be in use in June, 2014. Some people think it’s faster and easier to take the underground and it is much safer. One underground ticket is...