• Matéria: Matemática
  • Autor: Priscila0473
  • Perguntado 9 anos atrás

CALCULE
x: (-1/3)³ + [3-¹ - ( - 3) -¹] -²

Respostas

respondido por: ProfAmaral
4
\ \ \ (-\frac{1}{3})^3+[3^{-1}-(-3)^{-1}]^{-2}\\ \\=-\frac{1}{27}+[(\frac{1}{3})^1-(-\frac{1}{3})^{1}]^{-2}\\ \\=-\frac{1}{27}+[\frac{1}{3}-(-\frac{1}{3})]^{-2}\\ \\=-\frac{1}{27}+[\frac{1}{3}+\frac{1}{3}]^{-2}\\ \\=-\frac{1}{27}+[\frac{1+1}{3}]^{-2}\\ \\=-\frac{1}{27}+[\frac{2}{3}]^{-2}\\ \\=-\frac{1}{27}+[\frac{3}{2}]^2\\ \\=-\frac{1}{27}+\frac{9}{4}\\ \\=-\frac{4}{108}+\frac{243}{108}\\ \\=-\frac{4+243}{108}\\ \\=\frac{239}{108}\\
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