Zadanie 9
(-4)^{-7}<6^{-4}<(-7)^{6}
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(-4)^{-7}=(-\frac{1}{4})^7<0 liczba ujemna
6^{-4}=(\frac{1}{6})^4=\frac{1}{6^4}<1
(-7)^6=7^6>1
Zadanie 10
(-4)^3+(-4)^3+(-4)^3+(-4)^3=-4^4=4*(-4)^3=4*[(-1)*4]^3=
=4*(-1)^3*4^3=4*(-1)*4^3=(-1)*4^1*4^3=-1*4^4=-4^4