Предмет: Алгебра, автор: ЛенаНовичок

решить уравнение 29^x - 17 3^x = 9

Ответы

Автор ответа: Milli205

0

2*9^x - 17 *3^x = 9

2*3^2x - 17 *3^x- 9 =0

3^x=t,t>0

2t^2-17t-9=0

D=289+72=361

t1=(17-19)/4=-1/2<0

t2=9

3^x=3^2

x=2

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