y=√20
試用x和y表示√200-√0.2
係mc嚟
a. x-y b.10y- (x÷10)
c.10x - (y÷10) d. 10(x-y)
唔該比埋計算步驟我
更新1:
仲有一條 ．= 乘 化簡 (n ． n ． n.......． n) n次 除 ( n+n+n+n........+n)n項 又係mc a. n^n-2 b. n^n/2 c.n-2 d n/2 唔該比step
更新2:
kristinang2005 唔係好明你既解釋..... 可唔可以講多次.....xd 咁你諗好左第一條先再答我啦..唔該=]
更新3:
但 係c.10x - (y÷10) 喎
