tìm x 2. 3 mũ x = 10. 3 mũ 12+ 8. 12 mũ 12

Giải thích các bước giải:

$2.3^x=10.3^{12}+8.12^{12}$

$\rightarrow 3^x=5.3^{12}+4.12^{12}$

$\rightarrow 3^x=5.3^{12}+4.(3.4)^{12}$

$\rightarrow 3^x=5.3^{12}+4.3^{12}.4^{12}$

$\rightarrow 3^x=5.3^{12}+3^{12}.4^{13}$

$\rightarrow 3^x=3^{12}(5+4^{13})$

$\rightarrow x=log_3(3^{12}(5+4^{13}))$