Question 20
which relation is also a function?
{(1,0), (2,2), (1,3)}
{(1, 2), (1,4), (2,6) }
{(2, 1), (2, 2), (2, 3) }
{(0,0), (4,0), (6,0) }

answer:

step-by-step explanation:

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2

step-by-step explanation:

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