How do you find $(f - g) (4)$ $(f-g)(4)$ given $f (x) = 4 x - 3$ $f(x)=4x-3$ and $g (x) = x^{3} + 2 x$ $g(x)=x^3+2x$ ?

Question

How do you find $(f - g) (4)$ $(f-g)(4)$ given $f (x) = 4 x - 3$ $f(x)=4x-3$ and $g (x) = x^{3} + 2 x$ $g(x)=x^3+2x$ ?

1 Answer

Impact of this question

36856 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-06-30T08:27:23

$(f - g) (4) = - 59$ $(f-g)(4)=-59$

Explanation:

$obtain (f - g) = f (x) - g (x)$ $" obtain " (f-g)=f(x)-g(x)$

$f (x) - g (x) = 4 x - 3 - x^{3} - 2 x$ $f(x)-g(x)=4x-3-x^3-2x$

$f (x) - g (x) = 2 x - 3 - x^{3}$ $color(white)(f(x)-g(x))=2x-3-x^3$

$to evaluate (f - g) (4) substitute x = 4 into (f - g)$ $"to evaluate " (f-g)(4)" substitute x = 4 into " (f-g)$

$(f - g) (4) = (2 \times 4) - 3 - {(4)}^{3}$ $(f-g)(color(red)(4))=(2xxcolor(red)(4))-3-(color(red)(4))^3$

$(f - g) (4) = 8 - 3 - 64$ $color(white)((f-g)(4))=8-3-64$

$(f - g) (4) = - 59$ $color(white)((f-g)(4))=-59$

Science

Math

Humanities

... and beyond

How do you find $(f - g) (4)$ $(f-g)(4)$ given $f (x) = 4 x - 3$ $f(x)=4x-3$ and $g (x) = x^{3} + 2 x$ $g(x)=x^3+2x$ ?

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

How do you find (f−g)(4)(f-g)(4) given f(x)=4x−3f(x)=4x-3 and g(x)=x3+2xg(x)=x^3+2x?

1 Answer

Explanation:

Related questions

Impact of this question

How do you find $(f - g) (4)$ $(f-g)(4)$ given $f (x) = 4 x - 3$ $f(x)=4x-3$ and $g (x) = x^{3} + 2 x$ $g(x)=x^3+2x$ ?