1) Realize os cálculos: a) √25= b) √36 = c) √49 = d) √81 = e) √121 =
2) Justifique as igualdades. a) √9=3, pois 32=3?=9. b) √64=8 c) √169 =13 d) √196 =14 e) √400=20
