Question

За 1 пример Много баллов!срочно
Третий пример!

Answer 1

Ответ:

Пошаговое объяснение:

$7^{x+1}\cdot2^x=98;~7\cdot7^x\cdot2^x=98;~~14^x=98:7;~~14^x=14;~~\\\\\boldsymbol{Otvet:x=1}\\\\\\3^{3x}+9\cdot5^{2x}=5^{2x}+9\cdot3^{3x}\\\\9\cdot5^{2x}-5^{2x}=9\cdot3^{3x}-3^{3x}\\\\8\cdot5^{2x}=8\cdot3^{3x}\\\\5^{2x}=3^{3x}\\\\25^x=27^x\\\\\bigg(\dfrac{25}{27}\bigg)^x=1\\\\\bigg(\dfrac{25}{27}\bigg)^x=\bigg(\dfrac{25}{27}\bigg)^0\\\\\boldsymbol{Otvet:x=0}$