Question

Quem Sabe essa?
Calcule.
A)
$- 5 { }^{2} + 1 - 74 {}^{0}$
B)
$( - 8) {}^{2} - 2 - ( - 1)$
C)
$(1 - 2.5) {}^{2}$
D)
$3 {}^{2} + 3 { - }^{2}$
E)

$5 {}^{0} - ( - 1) - ( - \frac{1}{2} ) {}^{2}$
F)
$( \frac{1}{2} ) { - }^{1} + ( \frac{1}{2} ) - { }^{2}$

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Answer 1

Resposta:

$A)\\ -5^2+1-74^0=\\ -25+1-1=\\ -26+1=-25\\ \\ B)\\ (-8)^2-2-(-1)=\\ +64-2+1=\\ 64+1-2=\\65-2=63\\ \\  C)\\ (1-2\times5)^2=\\ (1-10)^2=\\ (-9)^2=+81\\ \\ D)\\ 3^2+3^{-2}=\\ 9+{1\over9}=\\ \\{ 81+1\over9}={82\over9}\\ \\ E)\\ 5^0-(-1)-(-{1\over2})^2=\\ \\ 1+2-(+{1\over4})=\\ \\ 3-{1\over4}=\\ \\ {12-1\over4}={11\over4}\\ \\ F)\\ ({1\over2})^{-1}+({1\over2})^{-2}=\\ \\ (2)^1+(2)^2=\\ 2+4=6$