[計量] 模考問題請教
其中有三題看不太懂...請高手幫忙解答一下~~感恩~~
1. 6^47 與 5^77
答: 6^47大
(應該不會真的去算吧...)
2. For all numbers r and s, where s不等於0
r@s=10r/s (p.s @是一個符號)
(0.01)@(0.01) 與 1
答 : (0.01)@(0.01)
3. a rectangular window with dimensions 2 meters by 3 meters
is to be enlarged by cutting out a semicircular region in
the wall. What is the area, in square meters, of this semicircular region?
答 : π/2
好像都是高中的題目...有點遙遠...麻煩好心版友解答~~感恩~~
====
第一題想選B比較大...但是答案是給A...這樣應該是答案錯了?
想要用工程計算機算一下，糟糕的連電子計算機怎麼按都忘了...(請不要鞭我T.T)
有想說要取log，但是GRE應該不會要我們背指數表~所以...
第二題可以請問怎麼算嗎?
我的算式是由題目給的公式導出得到 @=10/S^2
S只說不等於0，無法得出S大小，所以我選了D。答案給的是A。
第三題的半圓是從2那邊長出去沒錯。^^"
2可以直接當圓的半徑用嗎?
自己擔心的怕2其實是條弦，不會那麼巧在半徑上?
感謝大家。^^
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