��.205 �� 10-11 �� (��)

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$�� 205. �� :�) {log(x; y)=2, log(x+1, y+23)=3};�) {(x+y)^x=(x-y)^y, log(2; x)=1+log(2; y));�) {(x-y)^(2y-x)=125, lg(2(x-y))=1};�) {2log(2;...$

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205. �� :

�) {log(x; y)=2, log(x+1, y+23)=3};

�) {(x+y)^x=(x-y)^y, log(2; x)=1+log(2; y));

�) {(x-y)^(2y-x)=125, lg(2(x-y))=1};

�) {2log(2; x)-3^y=15, 3^y�log(2; x)=2^log(2; x)+3^(y+1)}.

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