Question

Найти значение выражения 1/2 х2 -7 при x = - 1/2 ПЛИЗ ПОМОГИТЕ!!!

Answer 1

Ответ:

$- \frac{55}{8}$

Решение:

подставим

$\frac{1}{2} \times ( - \frac{1}{2} ) {}^{2} - 7 =$

знак в чётной степени положителен, убираем минус:

$\frac{1}{2} \times ( \frac{1}{2} ) {}^{2} - 7 =$

=>

$( \frac{1}{2} ) {}^{3} - 7 =$

$\frac{1}{8} - 7 = - \frac{55}{8}$

Ответ:

$- \frac{55}{8}$

Answer 2

Calculating the Value of the Expression 1/2 * 2 - 7 at x = -1/2

To find the value of the expression 1/2 * 2 - 7 at x = -1/2, we can substitute the value of x into the expression and perform the arithmetic operations.

The expression is: 1/2 * 2 - 7

Substituting x = -1/2, we get: 1/2 * 2 - 7 = -1 - 7 = -8

So, the value of the expression 1/2 * 2 - 7 at x = -1/2 is -8.

[[SOURCE #1]]