Question

funçao de 3 em 2x²-6x+4

Answer 1

g(x) = 2x²-6x-4

Basta substituir o x pelos valores entre parênteses:

a) g(3) = 2*(3)²-6*(3)-4 = 2*9-18-4 = 18-18-4 = -4

b) g(-2) = 2*(-2)²-6*(-2)-4 = 2*4-(-12)-4 = 8+12-4 = 16

c) g(5) = 2(5)²-6*(5)-4 = 2*25-30-4 = 50-30-4 = 16

d) g(√3) = 2*(√3)²-6*(√3)-4 = 2*3-6√3-4 = 2-6√3

e) g(0)+g(4) = 2*(0)²-6*(0)-4 + 2*(4)²-6*(4)-4 = -4+2(16)-24-4 = -4+32-28 = 0

f) g(1/2) - g(1) = 2*(1/2)²-6*(1/2)-4 - [2*(1)²-6*(1)-4] = 2*(1/4)-3-4 - [2-6-4] = 1/2-7-(-8) = 1/2-7+8 = 1/2+1 = 3/2