題目是:
The area of a rectangluar region The area of a rectangular region
with sides of lengths a and 5 with sides of lengths (a+1) and 4
比大小的題目,答案是D,無法比較.
但是我不太懂為什麼無法比較,是不是我漏掉什麼條件了
麻煩告訴我,謝謝.