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2 la 4x-1 =128 repede am nevoie ​

Răspuns :

[tex] {2}^{4x - 1} = 128[/tex]

[tex] {2}^{4x - 1} = {2}^{7} [/tex]

[tex] = > 4x - 1 = 7[/tex]

[tex]4x = 8[/tex]

[tex]x = 8 \div 4 = 2[/tex]