[問題] 問幾題數學題
因為寫到了兩題不太懂得數學 上來請教各位了
1.The rate of a certain chemical reaction is directly proportional to the
square of the concentration of chemical A present and inversely proportional
to the concentration of chemical B present. If the concentration of chemical
B is increased by 100 percent, which of the following is closest to the
percent change in the concentration of chemical A required to keep the
reaction rate unchanged ?
(A)100% decrease (B)50% decrease (C)40% decrease (D)40% increase
(E)50% increase
ANS:(D)
2.For every positive even integer n the function h(n) is defined to be the
product of all the even integers from 2 to n, inclusive. If p is the
smallest prime factor of h(100)+1, then p is ??
(A)between 2 to 10 (B)between 10 to 20 (C)between 20 to 30
(D)between 30 to 40 (E)greater than 40
ANS:(E)
以上兩題 麻煩各位了 感謝
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