If f(x) is an even function and a is a positive real number,

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If f(x) is an even function and a is a positive real number, then ^a∫_-a f(x) dx

1. 0
2. a
3. 2a
4. 2^a∫₀ f(x) dx0

Correct Option: D

^∞∫_-∞f(x) dx =		2^a∫₀f(x)dx			f(x) is even
		0			f(x) is odd