Question

Função afim de f (2)=4 e f (4)=2

Answer 1

Resposta:

f(x)= ax+b

f(2)=4

f(4)=2

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f(2)= 2a+ b

2a+b=4

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f(4)= 4a+b

4a+b=2

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2a+b=4 x(-1)

4a+b=2

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-2a-b=-4

4a+b=2

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2a= -2

a=-2/2

a=-1

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2a+b=4

2(-1)+b=4

-2+b=4

b= 4+2

b=6

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f(x)= -x+6