Question

Determine a raiz das funções :

a)F (x)=3x-12
b)F (x)=x-7
c)F (x)=4x
d)F (x)=2x-9

Answer 1

a)F (x)=3x-12 ==> 3x - 12 = 0 ==> 3x = 12 ==> x = 4
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b)F (x)=x-7 ==> x - 7 = 0 ==> x = 7
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c)F (x)=4x ==> 4x = 0 ==> x = 0
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d)F (x)=2x-9 ==>2x - 9 = 0 ==> 2x = 9 ==> x = 9/2