Q. What is the average value of ex on the interval [3,9] ?Choose 1 answer:(A) 6e9+e3(B) 2e9+e3(C) 6e9−e3(D) 2e9−e3
Formula for Average Value: The average value of a continuous function f(x) on the interval [a,b] is given by the formula:Average value = (b−a)1∫abf(x)dxFor the function ex on the interval [3,9], we have:Average value = (9−3)1∫39exdx
Calculate Integral of ex: Calculate the integral of ex from 3 to 9. The integral of ex with respect to x is ex, so we evaluate it at the bounds 9 and 3: ∫39exdx=ex∣39=e9−e3
Substitute Integral Result: Substitute the integral result into the average value formula:Average value = (1/(9−3))×(e9−e3)Average value = (1/6)×(e9−e3)
Simplify to Find Average Value: Simplify the expression to find the average value:Average value = 6e9−e3This corresponds to answer choice (C).
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