B. 3х-1-3х+3х+1 = 63;

Question

B. 3х-1-3х+3х+1 = 63;

Comments

b.3^х-1-3^х+3^х+1 = 63;

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уточните степень х или х-1?

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х-1

Answer 1

3х=63
х=63/3
х=21
ответ х=21

Comments

там немного по другому

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(1/3)*3^x - 3^x + 3*3^x = 63

3^x * ( 1/3 - 1 + 3) = 63
3^x * (7/3) = 63
3^x = 27, откуда
х = 3

Answer 2

3х-1-3х+3х+1=63
3х=63
х=21