Mean and RMS value

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Analytical Geometry
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Integration and Its Applications
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TRIGONOMETRY
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The mean value of f(x) over [a, b] is defined as?
A
(1/(b - a)) ∫ₐᵇ f(x) dx
B
∫ₐᵇ f(x) dx
C
∫ₐᵇ f(x)² dx
D
(b - a) ∫ₐᵇ f(x) dx
Analysis & Theory

Mean value = (1/(b - a)) ∫ₐᵇ f(x) dx.