A General Quadratic Demand Function Has the Form to Follow $q = c p ^ { 2 } + l p + r$

question 40

Multiple Choice

A general quadratic demand function has the form to follow. $q = c p ^ { 2 } + l p + r$ (c, l, r are constants, $l \neq 0$ )

Obtain a formula for the elasticity of demand at a unit price p.

• A) \(E = c p ^ { 2 } + l p + r\)
• B) \(E = - \frac { 2 } { p + r }\)
• C) \(E = - \frac { p ( 2 c p + l ) } { c \mathrm { p } ^ { 2 } + l p + r }\)
• D) \(E = - l p\)
• E) \(E = \frac { c p + l } { c p ^ { 2 } + l p + r }\)

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