Question

find the value of the expression (m\times n^{r}) for (m = - 19,n = 1,) and (r = 3).

Explanation:

Step1: Substitute values

Substitute $m=-19$, $n = 1$, and $r = 3$ into $m\times n^{r}$. We get $-19\times1^{3}$.

Step2: Calculate exponent

Calculate $1^{3}$. Since any number to the power of 3 means multiplying the number by itself three - times, $1^{3}=1\times1\times1 = 1$.

Step3: Calculate product

Multiply - 19 by 1. $-19\times1=-19$.

Answer:

$-19$