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Let h(z)arccot ( 122 +212)-Determine the value(s) of z, if any, for which h has a horizontal tangent line.Oh has a horizontal tangent line at
Let h(z)arccot ( 122³ +212²)-Determine the value(s) of z, if any, for which h has a horizontal tangent line.Oh has a horizontal tangent line at z =Oh has no horizontal tangent lines.
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