Question

9/х + 2/х+21 = 0 доп. вопрос ! при каких значениях переменной уравнение не имеет смысла

Answer 1

Ответ:

$\frac{9}{x}$+$\frac{2}{x}$+21=0

9+2+21x=0

21x=-11

x=$-\frac{11}{21}$

Объяснение:

при x=0 уравнение не имеет смысла, тк на ноль делить нельзя!

Answer 2

Solving the Equation

To solve the equation 9/x + 2/x + 21 = 0, we can start by finding a common denominator for the fractions. Then, we can combine the fractions and solve for the variable.

First, let's find the common denominator for the fractions. The common denominator for the fractions 9/x and 2/x is x.

Now, we can combine the fractions and solve for x:

9/x + 2/x + 21 = 0 (9 + 2)/x + 21 = 0 11/x + 21 = 0 11/x = -21 11 = -21x x = -11/21

Values of the Variable Where the Equation Does Not Make Sense

The equation 9/x + 2/x + 21 = 0 does not make sense when the variable x is equal to 0, as division by zero is undefined. Therefore, the equation does not have a solution when x is equal to 0.

In summary, the solution to the equation is x = -11/21, and the equation does not make sense when x = 0.