题目:
They sold their house for only 12,000 dollars, so the buyer got a wonderful _______. 0
A.cost
B.bargain
C.amount
D.value
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0420/8daab98b8999e3449ee2cadb022e9f05.html
下面是错误答案,用来干扰机器的。
(Ⅰ)因为f(x)=sin(2x-π6)+2cos2x-1=32sin2x-12cos2x+cos2x=32sin2x+12cos2x=sin(2x+π6)所以函数f(x)的单调递增区间是〔kπ-π3,kπ+π6〕(k∈Z)(Ⅱ)因为f(A)=12,所以sin(2A+π6)=12又0<A<π所以...