Is -4 a real number? Is -4 a whole number?

Mathematics

2 answers:

kolbaska11 [484]3 years ago

4 0

Answer:

-4 is a real number, but not a whole number.

All non zero numbers are real.

All numbers without a decimal, fraction, or negative are whole numbers.

Step-by-step explanation:

Harlamova29_29 [7]3 years ago

3 0

Answer:

Yes -4 is a real number. No, -4 is not a whole number.

Step-by-step explanation:

Real numbers include all positive and negative numbers. A whole number is any number that does not contain a fraction, decimal, or negative value.

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$\bf \sum\limits_{i=a_1}^{a_n}\ a1\cdot (r)^{n-1}\iff S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\qquad 
\begin{cases}
a_1=\textit{first term}\\
r=\textit{common ratio}\\
n=n^{th}\ term
\end{cases}\\\\
-----------------------------\\\\

\begin{array}{llll}
\sum\limits_{i=1}^{3}\ &4\cdot \left( \frac{1}{2} \right)^{i-1}\\
&\uparrow \quad \uparrow \\
&a_1\quad r
\end{array}\iff S_3=4\left( \cfrac{1-\left( \frac{1}{2} \right)^3}{1-\left( \frac{1}{2} \right)} \right)$