Question

y

第9題

quake.
閱讀
Though they'
a few second:
Taiwan e.
Back in April, 1
power of the f
earthquake no
City, it also b
earthquake fro
Jiji or Nantouk
and showed ju
be. The governi
sure that noi
damage ever at
Juseum of Taiv
earthquake
rict of Taich
school. The
damage
hquake.
ch of
er
ed s
1≤x23 or
2X-1≤3
2854
-3<*<-
1-x3
-242x
32
第1章數與式
(1)
8.解下列不等式.
(1)1≤ [x] <3.
(2)/2x-11≤3.
(2)
x≤2
1077
(2 = xit
9. 小菡某日執行一計算,因精神不濟,將一正數“乘以0.5,”誤計算為“乘以0.5,”導致
所得結果相差1,則此正數應為多少?
18.
C.5X+1
亨 水餃
阿拿
手工
1. 阿亨手工水餃包裝上標示,每顆重量是32公克±5%,假設
每顆水餃的實際重量為x公克,試求x滿足的絕對值不等式
-al≤b.
六:P公克±a%意指P公克±PXa%公克)
9.1
32x
= 1.6
每顆重量
32公克±5%
321.6≤x≤32+1.6
21.6≤x-32≤1.6
|x-321≤1.6
利

Answer 1

綾

一個是「乘以0.5循環5」另一個是「乘以0.5」
前者=5/9
設此正數為x
(5/9)x - 0.5x = 1
=> x/18 = 1
=> x = 18