请教MATH8-Q34

bdx2010

答案据说是D,还请各位大牛给看看~~谢谢啦

Q34:

The number n of units of its product that Company X is scheduled to produce in month t of its next fiscal year is given by the formula n = , where c is a constant and t is a positive integer between 1 and 6, inclusive.  What is the number of units of its product that Company X is scheduled to produce in month 6 of its next fiscal year?

(1)   Company X is scheduled to produce 180 units of its product in month 1 of its next fiscal year.

(2)   Company X is scheduled to produce 300 units of its product in month 2 of its next fiscal year.

                  

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

Answer:

ghbz

bdx，你帖的两题题干都是不完整滴~

bdx2010

汗~~N等于900/(1+C*2的负t次方）,那个贴不上啊~~呵呵，非常感谢~~

The number n of units of its product that Company X is scheduled to produce in month t of its next fiscal year is given by the formula n =  , where c is a constant and t is a positive integer between 1 and 6, inclusive.  What is the number of units of its product that Company X is scheduled to produce in month 6 of its next fiscal year?

(1)   Company X is scheduled to produce 180 units of its product in month 1 of its next fiscal year.

(2)   Company X is scheduled to produce 300 units of its product in month 2 of its next fiscal year.

                  

时间造物

原题是：

The number n of units of its product that Company X is scheduled to produce in month t of its next fiscal year is given by the formula n = 900/(1+C2^-t), where c is a constant and t is a positive integer between 1 and 6, inclusive. What is the number of units of its product that Company X is scheduled to produce in month 6 of its next fiscal year?
(1) Company X is scheduled to produce 180 units of its product in month 1 of its next fiscal year.
(2) Company X is scheduled to produce 300 units of its product in month 2 of its next fiscal year.

解答：有条件1，得到    180=900/(1+C2^-1) = 900/(1+C/2) = 900/(2+C)/2 = 1800/(2+C)，C=8，因此可以算出t=6的值。

条件2，推理过程同上，

所以D