11. [0/0.4 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find the derivative of the function. y = (x\textsuperscript{2} + 3) \coth(\frac{x}{9}) y' = 3x\textsuperscript{2}\coth(\frac{x}{9}) + 3 \coth(\frac{x}{9}) Need Help? Read It 12. [0/0.4 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find the derivative of the function. g(x) = (\text{sech}(3x))\textsuperscript{2} g'(x) = -6x(\text{sech}(3x)\tanh(3x))\textsuperscript{2} Need Help? Read It Watch It
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First, let's find the derivative of coth(3x^2). The derivative of coth(x) is -csch^2(x), so the derivative of coth(3x^2) is -csch^2(3x^2). Show more…
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