Question

oblicz a)[(-1\2)*(-1\5)] b)[(-3)*(-1\2)]do-3potegi c)[(-1)*2*(-1\4)]do-4potegi d)[(-0,1)*(-2)*(-1\8)]do-2potegi e)[(-0,2)*5]do-2potegi

Answer 1

a)

(-1/2)*(-1/5) = 1/10

b)

[(-3)*(-1/2)]^3 = (3/2)^3 = 27/8 = 3 3/8

c)

[(-1)*2*(-1/4)]^4 =  (1/2)^4 = 1/16

d)

[(-0,1)*(-2)*(-1/7)]^2 = [0,2 *(-0,125)]^2 = (-0,025)^2 = 0,000625

e)

[(-0,2)*5]^2 = (-1)^2 = 1

 

Jezeli potęgi są ujemne,to:

b)

[(-3)*(-1/2)]^-3 = (3/2)^-3 = (2/3)^3 = 8/27

c)

[(-1)*2*(-1/4)]^-4 = (1/2)^-4 = 2^4= 16

d)

[(-0,1)*(-2)*(-1/8)]-2 = [2/10 *(-1/8)]^-2 = (-1/40)^-2 =(- 40)^2 = 1600

e)

[(-0,2)*5]^-2 = (-1)^-2 = 1