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frutty [35]
3 years ago
13

When f(x)=4 what is the value of x?

Mathematics
2 answers:
Katarina [22]3 years ago
7 0
When f(x) = 4 then x = 2 (domain = 2, range = 4)

hope it helps

guajiro [1.7K]3 years ago
7 0
From the mapping above it can be seen that the given relationship is bijective<span> (</span>one-to-one and onto<span> or </span>one-to-one correspondence) as e<span>ach element of the range is mapped to by </span>exactly<span> one element of the domain. So f(x)=4 implies f(2)=4 or simply x=2</span>
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you can buy 6 buckets

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The line tangent to the graph of g(x) = x^{3}-4x+1 at the point (2, 1) is given by the formula
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well, about A and D, I just plugged the values on the slope formula of

\bf \begin{array}{llll} g(x)=x^3-4x+1\\ L(x) = 8(x-2)+1 \end{array} \qquad \begin{cases} x_1=1.9\\ x_2=2.1 \end{cases}\implies \cfrac{f(b)-f(a)}{b-a}

for A the values are 8.01 and 8.0, so indeed those "slopes" are close. \textit{\huge \checkmark}

for D the values are -2.25 and 8.0, so no dice on that one.

for B, let's check the y-intercept for g(x), by setting x = 0, we end up g(0) = 0³-4(0)+1, which gives us g(0) = 1.

checking L(x) y-intercept, well, L(x) is in slope-intercept form, thus the +1 sticking out on the far right is the y-intercept, so, dice. \textit{\huge \checkmark}

for C, well, the slope if L(x) is 8, since it's in slope-intercept form, the derivative of g(x) is g'(x) = 3x² - 4, and thus g'(0) = -4, so no dice.

for E, do they intercept at (2,1)?  well, come on now, L(x) is a tangent line to g(x), so that's a must for a tangent. \textit{\huge \checkmark}

for F, we know the slope of the line L(x) is 8, is g'(2) = 8?  let's check

recall that g'(x) = 3x² - 4, so g'(2) = 3(2)² - 4, meaning g'(2) = 8, so, dice. \textit{\huge \checkmark}

6 0
3 years ago
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