Question

calcule
A = x^4 - x^2 + 2x/3, para x = -3 e x = 1/4

Answer 1

Resposta: x = -3, 74

x = -3

 $3^{4} - 3^{2} + 2 \frac{3}{3} = 81 - 9$  + 2 (pois 3/3 = 1, 2x 1 = 2)

81 - 9 = 72

72 + 2 = 74

x = 1/4

1/4^4 - 1/4^2 + 2 x 1/4/3

1/256 - 1/16 + 3/2

-1/240 + 3/2 = 359/240