Пожалуйста объясните , как решать :3^x+2+4×3^x+1=21 - №12509668

Пожалуйста объясните , как решать :3^x+2+4×3^x+1=21
- Предмет:
  Алгебра
- Автор:
  gracelynwu
- 6 лет назад

Ответы 1

3^(x+2)+4*3^(x+1)=213²*3^x+4*3¹*3^x=219*3^x+12*3^x=2121*3^x=213^x=13^x=3^0x=0.
- Автор:
  sweetie-pie
- 6 лет назад
- 0
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