Question

O valor numérico das expressões
a) √49\36 - √4\9
b) √25\36 : (- 2\3 )
c) 1 - √1,21 + √0,25
d) 3\√25 + 2
e) 2\3 . √0,81-4\7.√0,49

Answer 1

a) 7/3-2/3 = 7-4/6=3/6=1/2
b) 5/6:-2/3 = - 5/6 * 3/2 = - 5/2*1/2 = - 5/4
c) -√1,21 + √1/4 = -11/10 +1/2 = -11+5/10 = -6/10 = -3/5
d) 3/5 + 2 = 3+10/5 = 13/5
e) 2√0,81/3 - 4√0,49/7 = 2√81/100/3 - 4√49/100/7 = 2*9/10/3 - 4*7/10/7 = 9/5/3-2*7/5/7 = 9/5*3 - 14/5/7 = 3/5-2/5 = 3-2/5= 1/5