Question

O valor da expressão numérica : *

3² + (7 -- 1)⁰  + 2²  +  (5 -- 1)¹

A) 18
B) 19
C) 21
D) 23
​

Answer 1

Resposta:

OLÁ!!!!

$7 - 1 = 6$

$3 {}^{2} + 6 {}^{0} + 2 {}^{2} + (5 - 1) {}^{1}$

$5 - 1 = 4$

$3 {}^{2} + 6 {}^{0} + 2 {}^{2} + 4 {}^{1}$

$3 {}^{2} = 9$

$9 - 6 {}^{0} + 2 {}^{2} + 4 {}^{1}$

$x {}^{0} = 1$

$9 + 1 + 2 {}^{2} + 4 {}^{1}$

$2 {}^{2} = 4$

$9 + 1 + 4 + 4 {}^{1}$

$9 + 1 + 4 + 4$

$9 + 1 = 10$

$10 + 4 + 4$

$10 + 4 = 14$

$14 + 4$

$\boxed {\boxed {18 \: LETRA \: A}}$