Question

De o valor de :

a) √64

b) √100

c) √400

d) √900

e) - √81

f) - √625

Answer 1

a)
$\sqrt{64} = \sqrt{2^6} =2^3=8$

b)
$\sqrt{100} = \sqrt{2^2.5^2} =2.5=10$

c)
$\sqrt{400} = \sqrt{2^4.5^2} =2^2.5=4.5=20$

d)
$- \sqrt{81} =- \sqrt{3^4} =-3^2=-9$

e)
$- \sqrt{625} =- \sqrt{5^4} =-5^2=-25$