119. The right-hand derivative of the function with the rule $f(x) = ([x] - |x|)^5\!\sqrt{9x}$, at the point $x = -3$, is equal to: (1) $-\dfrac{16}{3}$ (2) $-5$ (3) $-4$ (4) $\dfrac{7}{3}$ %% Page 21 Mathematics 120-C Page 4
120. The tangent line to the curve of function $f$ at a point of length 3 on it, has equation $x + 2y = 7$. If $g(x) = \dfrac{1}{x} f^{-1}(x)$, then $g'(2)$ is which of the following? (1) $-\dfrac{7}{4}$ (2) $-\dfrac{5}{4}$ (3) $-\dfrac{3}{4}$ (4) $\dfrac{1}{4}$
\textbf{119.} The right-hand derivative of the function with the rule $f(x) = ([x] - |x|)^5\!\sqrt{9x}$, at the point $x = -3$, is equal to:
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(1) $-\dfrac{16}{3}$ \hfill (2) $-5$ \hfill (3) $-4$ \hfill (4) $\dfrac{7}{3}$
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\textbf{Mathematics \hfill 120-C \hfill Page 4}
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\textbf{120.} The tangent line to the curve of function $f$ at a point of length 3 on it, has equation $x + 2y = 7$. If $g(x) = \dfrac{1}{x} f^{-1}(x)$, then $g'(2)$ is which of the following?
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(1) $-\dfrac{7}{4}$ \hfill (2) $-\dfrac{5}{4}$ \hfill (3) $-\dfrac{3}{4}$ \hfill (4) $\dfrac{1}{4}$
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