помогите пожалуйста
[tex]1) 3 ^{5x-1}=81 [/tex]
[tex]2) 3^ {2x-1}= \frac{1}{9} [/tex]
[tex]3)49 ^{2x-3}= \frac{1}{7} [/tex]
[tex]1) 3 ^{5x-1}=81 [/tex]
[tex]2) 3^ {2x-1}= \frac{1}{9} [/tex]
[tex]3)49 ^{2x-3}= \frac{1}{7} [/tex]
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Verified answer
7^(2x-3)=7^-1
2x-3=-1
2x=2
x=1
3^(2x-1)=3^-2
2x-1=-2
2x=-1
x=-1/2
3^(5x-1)=3^4
5x-1=4
5x=5
x=1