Question

Qual valor aproximado de
a) √3125
b) √180
c) ³√128
d) ³√432

Answer 1

a) √3125 = √5×625= 25 × √5 = 25 × 2,23 = 55.75
b) √180 = √10 × 18 = √2 × 5 × 2 × 9 = 2 × 3 √5 = 6 × 2,23 = 13,38
c) ∛128 = ∛2 ∧7 = ∛2∧6 × 2 = 2∧2 ∛2 = 4 ∛2 = 4 × 1,25 = 5
d) ∛432 = ∛2∧4 × 3∧3 = ∛2∧3 × 3∧3 × 2 = 2 × 3 ∛2 = 6 × 1.25 = 7,5