пожалуйста
решите уровнение
[tex] log_{7} (5x-2)= log_{7} (x+10)[/tex]
[tex] log_{4} x+ log_{4} (x-3)=1[/tex]
решите неравенства
[tex]log_{2} (2x+4) \leq 3[/tex]
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Answers & Comments


1)
x\ \textgreater \ 0.4\\5x-2=10+x\\4x=12\\x=3

2)

x\ \textgreater \ 3\\log_4x(x-3)=log_44\\x^2-3x-4=0\\(x-4)(x+1)=0\\x_1=4\\x_2=-1
подходит только х=4

3)

x\ \textgreater \ -2\\log_{2} (2x+4) \leq 3\\2x+4 \leq 8\\x \leq 2\\(-2;2]
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