问题
解答题
已知y1=x+3，y2=2-x，当x取何值时，y1比2y2大5．
答案
∵y1=x+3，y2=2-x，y1比2y2大5．，
∴x+3-2（2-x）=5，
∴x=2，即x=2时，y1比2y2大5．
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已知y1=x+3，y2=2-x，当x取何值时，y1比2y2大5．
∵y1=x+3，y2=2-x，y1比2y2大5．，
∴x+3-2（2-x）=5，
∴x=2，即x=2时，y1比2y2大5．
In October, James Knight owned stock in Valerio, Inc. , that was valued at $45 per share. At that time, Knight sold a call option on Valerio with an exercise price of $60 for $1.45. In December, at expiration, the stock is trading at $32. What is Knight’s profit (or loss) from his covered call strategy Knight:
A．
| A. lost $11.55. |
B．
| B. lost $13.00. |
C．
| C. gained $1.45. |