[計量] PP1-DS-64.180.192.198&PS63~~
63.
For which of the following functions is f(a + b) = f(a) + f(b) for all
positive numbers a and b ?
(A) f(x) = x^2
(B) f(x) = x + 1
(C) f(x) = 根號2
(D) f(x) = 2/x
(E) f(x) = -3x
答案E 這種類的題目要怎麼解呢@@~~
64.
Are at least 10 percent of the people in Country X who are 65 years old or
older employed?
(1) In Country X, 11.3 percent of the population is 65 years old or older.
(2) In Country X, of the population 65 years old or older, 20 percent of the
men and 10 percent of the women are employed.
答案B
180.
Are x and y both positive?
(1)2X-2Y=1
(2)X/Y>1
答案C
192.
Of the 75 houses in a certain community, 48 have a patio. How many of the
houses in the community have a swimming pool?
(1) 38 of the houses in the community have a patio but do not have a swimming
pool.
(2) The number of houses in the community that have a patio and a swimming pool
is equal to the number of houses in the community that have neither a
swimming pool nor a patio.
答案B 我選C 囧> 要怎麼只看第二個選項推得呢??
198.
Did one of the 3 members of a certain team sell at least 2 raffle tickets
yesterday?
(1) The 3 members sold a total of 6 raffle tickets yesterday.
(2) No 2 of the members sold the same number of raffle tickets yesterday.
答案D 恩恩 不太懂第二個選項@@~~
麻煩好心人解答 感恩^^
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