Re: [計量] 請問幾題題意?
※ 引述《welt2010 (世界)》之銘言:
: 題目看不懂 > <
: pp的...
: 1.
: T is no more than 20 percent greater than the integer x, and T is no smaller
: than a number 20 percent less than the interger x. If T=60, which of the
: following indicates the smallest possible interval for x?
: Ans: 50<= x <= 75
: 意思是說,T 比 x 大的範圍是T的20% (12)
: 但第二句就看不懂了....
T不大於(就是小於等於啦)1.2倍的整數x,且T不小於( = 大於等於)0.8倍的整數x
如果T = 60,則x的最小可能區間為?
所以可以列
T≦1.2x => 60≦1.2x => x=50
T≧0.8x => 60≧0.8x => x=75
∴ 50≦x≦75
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