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bo 0ⁿ=0
(2^2)^7=2^(2*7)=2^14
bo (a^m)^n=a^(m*n)
2^20 + 2^20=2^20*(1+1)=2^20*2=2^(20+1)=2^21
wyciagasz 2^20 przed nawias
2^3*2^7=2^(3+7)=2^10
bo a^m * a^n=a^(m+n)
1/2 * 2^2=2^-1*2^2=2^(-1+2)=2^1=2
bo 1/a=a^-1