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2 years ago

The functions f and g are defined by f(x)=2x+1 and g(x)= 5x-1. finda. fg(3)

Mathematics

1 answer:

erastovalidia [21]2 years ago

7 0

G(3) - sub in 3 into g
5(3)-1 = 14

sub into f
2(14)+1 = 29

fg(3) = 29

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$\frac{\begin{matrix}\:\:&4&\:\:&\textbf{12}&10&\:\:\\ \:\:&\linethrough{5}&.&\textbf{\linethrough{13}}&1&6\\ -&1&.&\textbf{9}&4&2\end{matrix}}{\begin{matrix}\:\:&\:\:&\:\:&\textbf{\:\:}&\:\:&4\end{matrix}}$

$\frac{\begin{matrix}\:\:&4&\:\:&12&\textbf{11}&\:\:\\ \:\:&\linethrough{5}&.&\linethrough{13}&\textbf{\linethrough{1}}&6\\ -&1&.&9&\textbf{4}&2\end{matrix}}{\begin{matrix}\:\:&\:\:&\:\:&\:\:&\textbf{\:\:}&4\end{matrix}}$

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$\frac{\begin{matrix}\:\:&\textbf{4}&\:\:&12&11&\:\:\\ \:\:&\textbf{\linethrough{5}}&.&\linethrough{13}&\linethrough{1}&6\\ -&\textbf{1}&.&9&4&2\end{matrix}}{\begin{matrix}\:\:&\textbf{3}&.&3&7&4\end{matrix}}$

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Please help me with this question

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The functions f and g are defined by f(x)=2x+1 and g(x)= 5x-1. finda. fg(3)​

The functions f and g are defined by f(x)=2x+1 and g(x)= 5x-1. finda. fg(3)