Question

Sendo A = 5 x + 7x-10, determine o valor de A quando : a) x=3 ... b) x=-4 c) x=2-¹ d) x=2-³ e) x=3-¹

Answer 1

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A(x)  = 5x + 7x - 10 = 12x - 10 

a) A(3) = 12*3 - 10 = 36 - 10 = 26 

b) A(-4) = 12*(-4) - 10 = -48 - 10 = -58 

c) A(1/2) = 12/2 - 10 = 6 - 10 = -4

d) A(1/8) = 12/8 - 10 = 3/2 - 20/2 = -17/2 

e) A(1/3) = 12/3 - 10 = 4 - 10 = -6