PP T1 Q6 Q168

[oneseven]

Q6
The value of (10^8-10^2)/(10^7-10^3) is closest of which of the following?

A. 1
B. 10
C. 10^2
D. 10^3
E. 10^4

Answer : B

Q168
For which of the following functions f is f(x)=f(1-x) for all x?

A. f(x)= 1-x
B. f(x)= 1-x^2
C. f(x)= x^2-(1-x)^2
D. f(x)= (x^2)(1-x)^2
E. f(x)= x/(1-x)

Answer: D

[wind31526]

Q6
The value of (10^8-10^2)/(10^7-10^3) is closest of which of the following?

A. 1
B. 10
C. 10^2
D. 10^3
E. 10^4

Answer : B

Q168
For which of the following functions f is f(x)=f(1-x) for all x?

A. f(x)= 1-x
B. f(x)= 1-x^2
C. f(x)= x^2-(1-x)^2
D. f(x)= (x^2)(1-x)^2
E. f(x)= x/(1-x)

Answer: D

6.上下同除10^2 → (10^6-1)/(10^5+10)
約等於10^6/10^5 =10


168. 拿1-x代入那五個方程式
只有D選項代入1-x的結果和代入x一樣