[1]
Solve the following inequalites
(a) (b)
x+3>2 x-2<3
(c) (d)
2(X+1)>4 7x-9>9x+7
[2]
Consider the sequence
-3,9,-27
wriit down (a) the 5th term,....
(b) the general term ,hence the 100th tern
f1-f2 mathematics(MATHS){help+A+)
2007-07-22 2:02 am
回答 (1)
2007-07-22 2:51 am
✔ 最佳答案
1.ax+3>2
x>2-3
x>-1
1.b
x-2<3
x<3+2
x<5
1.c
2(X+1)>4
2X+2>4
2X>2
X>1
1.d
7x-9>9x+7
7x-9x>7+9
-2x>16
x<-8 [because -2(-8)=16 but -2(-9)>16 -8>-9]
2.
a: -3,9,-27,81, -243<--這是答案,因為這些數是由前一個數 乘-3 得來的
b: the 100th term: (-3)^100 =3^100
參考: me
收錄日期: 2021-04-23 22:20:47
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