Two date periods are known in C #, For example, good days from December 1,2008 to January 4,2009?

Create two date types and subtract them to take the number of days
DateTime dt1= DateTime.Parse ("2008-12-1");
DateTime dt2= DateTime.Parse (" January 4,2009");
Double days =(dt2-dt1).TotalDays;

How to do the math problem calculation in the second half of the senior three High one high two all do not have this kind of situation, but high three often make low-level mistake. Want to improve mathematics achievement very much, usually in pass the line wandering, study the subject, how to do In the second half of the third year, there were often mistakes in the math calculation. What should we do? This was not the case in the first or second year, but in the third year, they often made low-level mistakes. They really wanted to improve their math scores. Usually, they would be on the pass line. What should they do if they were in the humanities

High school in the sense of learning in primary school those four operations or have a great use, this is actually not a good way, one is usually more practice, practice speed is your usual math test when the math test paper do fast? It is recommended that you speed up, leaving a little time to check the problem of heavy calculation.

High school in the sense of learning in primary school those four operations or have a great use, this is actually not a good way, one is usually more practice, practice speed is your usual math test when the math test paper do it fast? It is recommended that you speed up, leaving some time to check the problem of heavy calculation.

Dear friends, help me calculate the date...... ……)…… ……… … Everyone help calculate a date...... He had the ability to type, but he didn' t have the ability to count...... She really didn' t want to say that she was lazy...... From September 23,2013 to 2013.12.25, how many days...... ……… … Dear friends, help calculate the date. ……)…… ……… … I want you to give me a date... ... Has the ability to type but doesn't have the ability to count... I don't want to say I' m lazy. How many days from September 23,2013 to 2013.12.25... ……… … My dear friends, help me calculate the date...... ……)…… ……… … Everyone help calculate a date...... He had the ability to type, but he didn' t have the ability to count...... He really didn' t want to say that he was lazy...... From September 23,2013 to 2013.12.25, how many days...... ……… …

Of course, of course.

Given function f (x)=3/1 x third power - ax square + b has extreme value at x =-2 (1) Find the monotone interval of function f (x) (2) The function f (x) has and only has a zero point on [-3,3]. (Tip: Above is the third power of x and the square of x)

1, F (x)= x2(1/3 x-a)+b, since f (x) has an extreme value at x=-2, a

Somebody help me with the results. 22001.2 (1+(2200-1000)/2000)^1.6=? 19501.2 (1+(1950-1000)/2000)^1.6=?

Please help me with the math. Right now, the Internet Cafe is doing activities. Give 100 for 100, give 600 for 500,3 yuan per hour, In that case, how much would it cost per hour? Then how much would it cost per hour if he charged 500 for 600? Ask someone with good math skills to help me figure it out The Internet Cafe was currently doing some activities. It was 100 free for 100,600 free for 500, and 3 yuan per hour. In that case, how much would it cost per hour? If he were to charge 500 for 600, how much would it cost per hour? Please help me with the math. Internet cafes now do activities, red 100 give 100, red 500 give 600,3 yuan per hour, How much is it per hour? How much does it cost to get 500 for 600?

Three dollars per hour,
However, if you charged 100 and gave 100, you could double the amount of time, which was equivalent to 1.5 yuan per hour;
A boost of 500 to 600 would increase the time by 1.2 times, equivalent to 1.36 yuan per hour.

It was still three yuan per hour.
However, if you charged 100 and gave 100 for free, you could double the amount of time, equivalent to 1.5 yuan per hour.
A boost of 500 to 600 was equivalent to 1.2 times the amount of time and 1.36 yuan per hour.

Three bucks an hour,
Only you charge 100 send 100, can double the time, can equal to 1.5 yuan per hour;
Give 600 for 500, can add 1.2 times the time, can be equivalent to 1.36 yuan per hour.

Two date periods are known in C #, For example, good days from December 1,2008 to January 4,2009?