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(1_7)^2=1_49
-1_7^2=-1_49
b)(-2)^5=-32
(-2)^-5=(-1_2)^5=-1_32
2^-5=1_2^5=1_32
c)...=2*2*2=8
...=2*2*2*pierwiastek z 2=8 pierwiastków z 2
...=1_2*1_2*1_2*1_2=1_16