For f(x) =1/x^2-3x, substitute 3 for x in the function to solve for f(3)

Mathematics

1 answer:

lys-0071 [83]2 years ago

6 0

Step-by-step explanation:

F(x) = 1/9 - 9

= (1-81)/9

=-80/9

...............................

Plzz mark it as a brilliant answer

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So.. take a peek at the picture... let's get two points from it, hmm say 0,4 notice it touches the y-axis there, and say hmmm -4, 1, almost at the bottom of the line

$\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
&({{ 0}}\quad ,&{{ 4}})\quad 
% (c,d)
&({{ -4}}\quad ,&{{ 1}})
\end{array}
\\\\\\
% slope = m
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$\bf y-{{ y_1}}={{ m}}(x-{{ x_1}})\qquad 
\begin{array}{llll}
\textit{plug in the values for }
\begin{cases}
y_1=4\\
x_1=0\\
m=\boxed{?}
\end{cases}\\
\textit{and solve for "y"}
\end{array}\\
\left. \qquad \right. \uparrow\\
\textit{point-slope form}$

once you get the slope and solve for "y", that'd be the equation of the line.

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For f(x) =1/x^2-3x, substitute 3 for x in the function to solve for f(3)​

For f(x) =1/x^2-3x, substitute 3 for x in the function to solve for f(3)