Potęgi o wykładniku całkowitym.
Oblicz:
a.) [(-2)^2 - 1,25 + 2,5^2] * (-2/3)^3 =
b.) (0,8 - 5/13 * 0,13) : (2/3)^-3 =
c.) [(-4)^2 : 1,6 - 6]^-2 =
d.) 5^2:2,5 - [(3/4)^-1 * (-1/2)^2 + 1 1/2:2,25] * 3/4 =
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a.) [(-2)^2 - 1,25 + 2,5^2] * (-2/3)^3 =
=[4-1,25+6,25]*(-8/27)=
=9*(-8/27)= -72/27=-2 18/27=-2 6/9=-2 2/3
b.) (0,8 - 5/13 * 0,13) : (2/3)^-3 =
=(4/5-5/13*13/100):(3/2)^3=
=(4/5-1/20):27/8=
=(16/20-1/20)*8/27=
=15/20*8/27=
=3/4*8/27=
=24/108=6/27
c.) [(-4)^2 : 1,6 - 6]^-2 =
=[16:1,6-6]^-2=
=(10-6)^-2=
=4^-2=
=(1/4)^2=
=1/16
d.) 5^2:2,5 - [(3/4)^-1 * (-1/2)^2 + 1 1/2:2,25] * 3/4 =
=25:2,5-[4/3*1/4+3/2:2,25]*3/4=
=10-(1/3+3/2*4/9)*3/4=
= 10-(1/3+12/18)*3/4=
=10-(1/3+2/3)*3/4=
=10-1*3/4=
=10-3/4=
=10-0,75=
= 9,25
licze na naj
mam nadzieję że pomogłem, liczę na naj:P