Question

Dada a função polinominal do 1grau F(x)=-5X+6,calcule

a)F (1)
b)o valor do X para que se tenha F (X)=0
c)F (-5)

Answer 1

f(x) = - 5x + 6

a) x = 1
f(x) = - 5x + 6
f(1) = - 5.(1) + 6
f(1) = - 5 + 6
f(1) = 1

b)
f(x) = 0
f(x) = - 5x + 6
0 = - 5x + 6
5x = 6
x = 6/5

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c) x = - 5

f(x) = - 5x + 6
f(-5) = - 5.(-5) + 6
f(-5) = 25 + 6
f(-5) = 31