Question

2)Calcule o valor das expressões abaixo.

a) 3² - ( -2 )⁴ + 1¹² - 2³
b) ( 5³ - 2⁷ ) + ( - 2 )³ + ( 1/ 100 )⁰
c) ( 2/3 + 3/4 )¹
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Answer 1

Explicação passo-a-passo:

A

$3 {}^{2} - ( - 2) {}^{4} + 1 {}^{12} - 2 {}^{3} \\ 3 \times 3 = 9 \\ 2 \times 2 = 4 \\ 1 \times 12 = 12 \\ 2 \times 2 \times 2 = 8 \\ 9 - 4 + 12 - 8 \\ = 9$

B

$(5 {}^{3} - 2 {}^{7} ) + ( - 2) { + }^{3} (1100) \\ 5 \times 5 \times 5 = 260 \\ 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 = 128 \\ 2 \times 2 \times 2 = 8 \\ 100 \times 0 = 100 \\ 260 - 128 - 8 + 100 = 164$

C

$(2 \div 3 + 3 \div4) {}^{1} \\ 2 \div 3 = 0.66 \\ 3 \div 4 = 0.75 \\ 0.66 + 0.75 = 1.41$