1. 1/(-3)嘅2次方x3嘅2次方-(-2)嘅3次方
2. 1/(-8)嘅2次方x6嘅2次方-3嘅2次方÷(-2)嘅2次方
3. (-1)嘅3456次方-(-1)654321/(-1)嘅19x97531次方
4. 〔9嘅2次方x１/(-6)嘅2次方-(-3)嘅2次方x5+3嘅2次方/-2嘅2次方〕x1/(-3)嘅4次方
數學(要step by step）
2007-10-05 3:02 am
回答 (2)
2007-10-05 3:53 am
✔ 最佳答案
1 ÷ (-3)² x 3² - (-2)³= 1 ÷ 9 x 9 - (-8)
= 1 + 8
= 9
1 ÷ (-8)² x 6² - 3² ÷ (-2)²
= 1 ÷ 64 x 36 - 9 ÷ 4
= 36 ÷ 64 - 9 ÷ 4
= 9 ÷ 16 - 9 ÷ 4
= (9 - 36) ÷ 4
= - 6.75
(-1)^3456 - (-1)654321 ÷ (-1)^ (19x97531)
P.S. -1 既單數次方係-1...而雙數次係1
= 1 - (-1) 654321 ÷ (-1)
= 1 - 654321
= - 654320
[ 9² x 1 ÷ (-6)² - (-3)² x 5 + 3² ÷ (-2)² ] x 1 ÷ (-3)^4
= ( 81 ÷ 36 - 45 + 9 ÷ 4 ) ÷ (-3)^4
= ( 4.5 - 45 ) ÷ 81
= (-40.5) ÷ 81
= -0.5
2007-10-05 3:20 am
1. 1/(-3) ² * 3²-(-2)³
= 1/9*9+8
=1+8
=9
2. 1/(-8) ²*6²-3²/(-2) ²
=1/64*36-9/4
=1/16*36*36-9/4
=64-2/1/4
=62/3/4
我只識計頭2題, 我今年先F.2, 計錯唔好鬧我>
= 1/9*9+8
=1+8
=9
2. 1/(-8) ²*6²-3²/(-2) ²
=1/64*36-9/4
=1/16*36*36-9/4
=64-2/1/4
=62/3/4
我只識計頭2題, 我今年先F.2, 計錯唔好鬧我>
參考: 自己
收錄日期: 2021-05-01 14:47:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071004000051KK02944