Question

Найдите множество значений функции
у
= 6
х
–
12.
1)
(0; +

)
2)
(
–
12; +

)
3)
[
–
12; +

)

Answer 1

$A20.\; \; y=6^{x}-12\\\\6^{x}>0\; \; \to \; \; (6^{x}-12)>-12\; \; \Rightarrow \\\\-12<6^{x}-12<+\infty \\\\y\in (-12,+\infty )\\\\A21.\; \; P=\frac{150-15}{150}=\frac{135}{150}=0,90$

$A23.\; \; I=\frac{U}{R}<25\; ,\; \; \farc{220}{R}<25\\\\R>\frac{220}{25}\\\\R>8,8$