已知函数 y=sin 1 2 x+ 3 cos 1 2 x ,求: (1)函数y的最大值,最小值及最小正周期; (2)函数y的单调递增区间.
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【单选题】Which of the following statements is FALSE?
A.
Sales will ultimately decline as the product nears obsolescence or faces increased competition.
B.
Managers sometimes continue to invest in a project that has a negative NPV because they have already invested a large amount in the project and feel that by not continuing it, the prior investment will wasted.
C.
With straight-line depreciation the asset's cost is divided equally over its life.
D.
A projects unlevered net income is equal to its incremental revenues less costs and depreciation, evaluated on an pre-tax basis.