Question

Resolva as expressões a seguir.

Answer 1

a) $7^3-49+5^2\\343-49+25\\319$

b) $(-8)^3 \div (-2) + 3 \times (-4)^3\\-512 \div 2 -3 \times (-64)\\256 - 192\\64$

c) $5^{-3}-(-\frac{1}{2})^2\\\frac{1}{5^3} -\frac{1}{25} \\\frac{1-5}{125} \\-\frac{4}{125} =-0,032$

d) $(\frac{2}{3}) ^{-2} -(\frac{2}{5}) ^{-3} \\(\frac{3}{2})^2 -(\frac{5}{2})^3\\ \frac{9}{4}-\frac{125}{8}\\ \frac{18-125}{8} \\-\frac{107}{8}=-13,375$

e) $(2-\frac{3}{4} )^2+(-\frac{1}{4})^2\\ (\frac{5}{2})^2+\frac{1}{16} \\\frac{25}{16}+\frac{1}{16} \\\frac{25+1}{16}\\ \frac{26}{16}=\frac{13}{8}=1,625$