3 years ago

1. Consider the function f(x) = x² – 9. Algebraically determine the domain of y = Vf(x) . State using set notation.

Mathematics

1 answer:

AfilCa [17]3 years ago

8 0

Answer:

-3<x<3

Step-by-step explanation:

let y=0

0=x^2-9

0=(x+3)(x-3)

x=-3 and x=+3

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I need help on this qustion

erastova [34]

what I put into my basic calculator is 5(3/4)-6(1/8)= 3 ft

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3 years ago

What is 99÷99+7÷4<br><br><img src="https://tex.z-dn.net/?f=2" id="TexFormula1" title="2" alt="2" align="absmiddle" class="latex-

weqwewe [10]

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3 years ago

What is a value of the 13th term of the sequence -7 negative 3 1 5?

RoseWind [281]

$\bf -7~~,~~\stackrel{-7+4}{-3}~~,~~\stackrel{-3+4}{1}~~,~~\stackrel{1+4}{5}~~,.....$

so, it's really adding 4 to get the next term, namely, 4 is the common difference, and the first term is -7.

$\bf n^{th}\textit{ term of an arithmetic sequence}
\\\\
a_n=a_1+(n-1)d\qquad
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\[-0.5em]
\hrulefill\\
a_1=-7\\
d=4\\
n=13
\end{cases}
\\\\\\
a_{13}=-7+(13-1)4\implies a_{13}=-7+48\implies a_{13}=41$