Question

решите срочно надо!!!​

Answer 1

$1)\; \; \frac{4x+6}{1,8-0,4x}\\\\1,8-0,4x\ne 0\; \; \to \; \; x\ne 4,5\; \; ,\\\\x\in (-\infty ;\; 4,5)\cup (4,5\, ;+\infty )\\\\\\2)\; \; \frac{2x-1}{49-x^2}\\\\49-x^2\ne 0\; \; \to \; \; x\ne \pm 7\\\\x\in (-\infty ,-7)\cup (-7,7)\cup (7,+\infty )$