Answers

2016-07-20T20:32:26+08:00
F(x)=3x-2

1. f(3)=3(3)-2
=9-2
=7
2. f(-1)=3(-1)-2
=-3-2
=-5
3. f(0)=3(0)-2
=0-2
=-2
4. f(k)=3(k)-2
=3k-2
5. f(a)+f(k)
f(a)=3(a)-2
=3a-2
f(k)=3(k)-2
=3k-2
f(a)+f(k)=3a-2+3k-2
=3a+3k-2-2
=3a+3k-4


g(x)x^2 -4

1. g(-3)=(-3)^2 -4
=9-4
=5
2. g(-3a)=(-3a)^2 -4
=9a^2 -4
3. 3g(a)=3[(a)^2 -4]
=3(a^2 -4)
=3a^2 -12
4. g(b+2)= (b+2)^2 -4
=b^2 +4b+4-4
=b^2 +4b
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