Q. Find the value of ∫493x−111dx. Express your answer as a constant times ln2.Answer: □ln2
Recognize standard form: Recognize the integral as a standard form. The integral ∫3x−111dx is a standard form of the integral of a function ax+b1. The antiderivative of ax+b1 is a1ln∣ax+b∣+C, where C is the constant of integration.
Calculate antiderivative: Calculate the antiderivative.To find the antiderivative of (1)/(3x−11), we can use the formula mentioned above with a=3 and b=−11. Thus, the antiderivative is (1/3)ln∣3x−11∣+C.
Evaluate definite integral: Evaluate the definite integral from 4 to 9. We need to evaluate the antiderivative at the upper and lower limits of the integral and subtract the lower evaluation from the upper evaluation. ∫493x−111dx=[31ln∣3x−11∣] from x=4 to x=9 = 31ln∣3(9)−11∣−31ln∣3(4)−11∣ = 31ln∣27−11∣−31ln∣12−11∣ = 31ln∣16∣−31ln∣1∣
Simplify expression: Simplify the expression.Since ln∣1∣=0, we can simplify the expression to:(1/3)ln∣16∣−(1/3)(0)=(1/3)ln(16)=(1/3)ln(24)=(1/3)(4)ln(2)=(4/3)ln(2)
Express final answer: Express the answer as a constant times ln2. The final answer is (34)ln(2), which is already expressed as a constant times ln2.
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