Найдите допустимые значения переменной в выражении: 1) y-10 / y^2+3 2) 6y / 3y-4 + 15/ y + 16 3) 32/5y - 3y + 1 / 2y+7

[tex]1)\; \; \frac{y-10}{y^2+3}\; \; ,\; \; \; \; odz: \; y^2+3\ne 0\; \; \to \; \; y\in (-\infty ,+\infty )\; \; \frac{6y}{3y-4}+\frac{15}{y+16}\; \; ,\; \; \; \; odz: \; \left \{ {{3y-4\ne 0} \atop {y+16\ne 0}} \right.\; \left \{ {{y\ne 1\frac{1}{3}} \atop {y\ne -16}} \right.\; \; \to (-\infty ,-16)\cup (-16\, 1\frac{1}{3})\cup (1\frac{1}{3}\, ,+\infty )[/tex]

[tex]3)\; \; \frac{32}{5y}-\frac{3y+1}{2y+7}\; \; ,\; \; \; odz: \; \left \{ {{5y\ne 0} \atop {2y+7\ne 0}} \right.\; \; \left \{ {{y\ne 0} \atop {y\ne -3,5}} \right. \; \; \to (-\infty ; -3,5)\cup -3,5\, ; \, 0)\cup (0; +\infty )[/tex]

1) а(х + у) + а(b - x) = a(y+b),

2) b(2x - 5y) - b(3x - y) = b(2x-5y-3x+y) = -b(x+4y),

3) 2c(a + b) + c(5a - 3b) = c(2a+2b+5a-3b) = c(7a-b),

4) x²(2x + 7y) - x²(3x - 5y) = x^2(2x+7y-3x+5y) = x^2(12y-x),

5) a(b + c) + x(b + c) = (b+c)(a+x),

6) a(3b + c) - x (3b + c) = (3b+c)(a-x),

7) 3y(2x - 9) - 5(2x - 9) = (2x-9)(3y-5),

8) 2a(3x + 1) + (3x + 1) = (3x+1)(2a+1),

9) k(x - y) + c(y - x) = (x-y)(k-c),

10) 3p(a - c) - (c - a) = (a-c)(3p+1),

11) 2p(a - x) - p(x - a) = (a-x)(2p+p) = 3p(a-x),

12) (y - a) + b(a - y) = (y-a)(1-b).