[問題]GWD7-16

[blacklilu]

:-$ 不好意思 又來問了

Q16: If n > 0, which is greater, 20 percent of n or 10 percent of the sum of n and 0.5 ?
(1) n < 0.1
(2) n > 0.01


Ans : A

[homaru]

:-$ 不好意思 又來問了

Q16: If n > 0, which is greater, 20 percent of n or 10 percent of the sum of n and 0.5 ?
(1) n < 0.1
(2) n > 0.01

Ans : A

題目問0.2n大還是0.1(n+0.5)大
化簡一下:2n>(n+0.5) or 2n<(n+0.5)
得出n>0.5 or n<0.5
1)n<0.1-->n<0.5能得出0.2n<0.1(n+0.5)
2)n>0.01-->n大於小於0.5都有可能,不充分

[blacklilu]

謝謝呀