Answers 459gx=1or^13 hx=0or 3 i x=¡ 2 or^145
2ax=¡^14 or^32 bx=¡ 6 or¡^43 c x=^12
dx=^52 ex=0or^25 f x=¡ 2 or 0EXERCISE 2D.3
1a bcdef2 functiond3fy:0 6 y 66 g
4afalse btrue ctrue dfalse
5a bcdefEXERCISE 2E
1a 5 ¡ 2 x b¡ 2 x¡ 2 c 11
2a 5 ¡x b 1 ¡x c 4+x
3a 25 x¡ 42 bp
8 c ¡ 7
4 f(g(x))=(2¡x)^2 ,
Domain=fx:x 2 Rg,
Range=fy:y> 0 gg(f(x))=2¡x^2 ,
Domain=fx:x 2 Rg,
Range=fy:y 62 g
5a(f±g)(x)=6x¡ 4 bx=¡^34
6a ix^2 ¡ 6 x+10 ii 2 ¡x^2 b x=§p^12
7aLetx=0, ) b=d and so
ax+b=cx+b
) ax=cx for allx
Letx=1, ) a=c
b(f±g)(x)=[2a]x+[2b+3]=1x+0 for allx
) 2 a=1 and 2 b+3=0
cYes, f(g±f)(x)=[2a]x+[3a+b]g
8a(f±g)(x)=p
1 ¡x^2
bDomain=fx:¡ 16 x 61 g, Range=fy:0 6 y 61 gEXERCISE 2F
1a bcdefghijkl2a bcdefghi3a bcdOyx
y = f(x)y = f(x)||y = f(x)Oyxy = f(x)||y = f(x)Oyxy = f(x)||y = f(x)Oyxy = f(x)||yxy = f(x)
Oy = f(x)||yx
y = f(x)Oy = f(x)||yO xyO xyO xy= x||
y= x+3||
3
-3yO xy= 6-2x||36yO xy= 3x+1||
1- Qe
y = 10 - 4x||
Tw10y-4 O x2y= x+2||Qw2-+x02++- x-2--x0-+x-3 0 4-++-x-1 0 3-+-+x-4 2+-+
x-2 0+-+
xQw 3-+-
x-1 3-+-x1++x-2 2- 0
+ + - x-1 2++-x12+- +x-2-1 1 2-+-+-x03+-+
x-1 3-+-
x+-+
Qw 5x-2++x-4--x3++x-2 1+- +x- Ew 4
- x
-3 0+-+xQr 2
- x
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Y:\HAESE\CAM4037\CamAdd_AN\459CamAdd_AN.cdr Tuesday, 8 April 2014 8:21:34 AM BRIAN