HELP ME!
( )係乘呀!
要步驟呀!
thx~
解下列方式:
①1÷ x-3=1
解下列各不等式:
②a+2>3
③3(x)-4<5
以二進數表示下列的數值:
④1(2)(2)(2)(2)+0(2)(2)(2)+0(2)+1
把下列數字以展開式表示:
⑤11110(2)
⑥4AB(16)
⑦把2E1(16)轉換為十進數:
⑧把110110(2)轉換為十進數:
⑨把37(10)轉換為二進數:
⑩把444(10)轉換為十六進數:
數學題好難!好難!help me~~~~~
2010-07-08 6:29 am
回答 (2)
2010-07-08 8:52 am
✔ 最佳答案
/=除 and *=乘1) 1/x-3=1, 1/x=4, 1/x*x=4*x, 1=4x, x=1/4, x=0.25
2) a+2>3, a+2-2>3-2, a>1
3) 3x-4<5, 3x-4+4<5+4, 3x<9, 3x/3<9/3, x<3
4) 1(2)(2)(2)(2)+0(2)(2)(2)+0(2)+1
=1*24+0*23+0*2+0*21+1*20
=10001(2)
5) 11110(2)
=1*24+1*23+1*22+1*21+0*20
=1(2)(2)(2)(2)+1(2)(2)(2)+1(2)(2)+1(2)+0
6) A=10, B=11, C=12 etc.
4AB(16)
=4*162+10*161+11*160
=4(16)(16)+10(16)+11
7) 2E1(16)
=2*162+14*161+1*160
=512+224+1
=737
=7*102+3*101+7*100
=700+30+7
=737(10)
8) 110110(2)
=1*25+1*24+0*23+1*22+1*21+0*20
=54
=54(10)
9) 37(10)=37
37/2=18 and 1餘數
18/2=9 and 0餘數
9/2=4 and 1餘數
4/2=2 and 0餘數
2/2=1 and 0餘數
剩下1
Low to high, i.e. 100101(2)
10) 444(10)=444
444/16=27 and 12餘數
27/16=1 and 11餘數
剩下1
12=C and 11=B
Therefore, 1BC(16)
2010-07-08 12:02:37 補充：
5) 30
6) 1195
2010-07-08 12:05:57 補充：
001那位人兄請驗算-3-
2010-07-08 6:57 am
A1. 1÷(x-3)=1
x-3=1
x=4
A2. a+2>3
a>1
A3 3x-4<5
3x<9
x>3
A4. 1(2)(2)(2)(2)+0(2)(2)(2)+0(2)+1
=10001(2做底)
A5 11110(2)
=1*2^4+1*2^3+1*2^2+1*2=30
A6 4AB(16)
=4*16^2+10*16+11=1344
A7 2E1(16)
=2*16^2+14*16+1=481
A8 110110(2)
=1*2^5+1*2^4+1*2^2+1*2=54
A9 37(10)
=1*2^5+1*2^2+1=100101(2)
A10 444(10)
=1*16^2+11*16+12=1BC(16)
x-3=1
x=4
A2. a+2>3
a>1
A3 3x-4<5
3x<9
x>3
A4. 1(2)(2)(2)(2)+0(2)(2)(2)+0(2)+1
=10001(2做底)
A5 11110(2)
=1*2^4+1*2^3+1*2^2+1*2=30
A6 4AB(16)
=4*16^2+10*16+11=1344
A7 2E1(16)
=2*16^2+14*16+1=481
A8 110110(2)
=1*2^5+1*2^4+1*2^2+1*2=54
A9 37(10)
=1*2^5+1*2^2+1=100101(2)
A10 444(10)
=1*16^2+11*16+12=1BC(16)
參考: by me
收錄日期: 2021-04-13 17:21:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100707000051KK01744