Exam 20: Properties of Logarithms

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Assume that x,y,and z are positive numbers.Use the properties of logarithms to write the expression −2log⁡bx−6log⁡by+17log⁡bz- 2 \log _ { b } x - 6 \log _ { b } y + \frac { 1 } { 7 } \log _ { b } z as the logarithm of one quantity. ?

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Rewrite the logarithm as a ratio of common logarithms. ? Log1/7 x ?

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Assume that x,y,and c are positive numbers.Use the properties of logarithms to write the expression log⁡cxy6\log _ { c } \sqrt [ 6 ] { x y } in terms of the logarithms of x and y. ?

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Condense the expression 7(log x - log y)to the logarithm of a single term.

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Condense the expression to the logarithm of a single quantity.? 2[3ln⁡x−ln⁡(x+8)−ln⁡(x−8)]2 [ 3 \ln x - \ln ( x + 8 ) - \ln ( x - 8 ) ] ?

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Rewrite the logarithm as a ratio of natural logarithms.? log⁡x511\log _ { x } \frac { 5 } { 11 } ?

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Use the change-of-base formula to rewrite the logarithm as a ratio of logarithms.Then use a graphing utility to graph the ratio. ? F(x)= log11.7 x ?

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Condense the expression to the logarithm of a single quantity. ? Log2 10 + log2 x ?

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The pH of an acidic solution is a measure of the concentration of the acid particles in the solution,with smaller values of the pH indicating higher acid concentration.In a laboratory experiment,the pH of a certain acid solution is changed by dissolving over-the-counter antacid tablets into the solution.In this experiment,the pH changes according to the equation pH=5.14+log⁡(x0.40−x)\mathrm { pH } = 5.14 + \log \left( \frac { x } { 0.40 - x } \right) , where x is the number of grams of antacid added to the solution.What is the pH of the solution after the addition of 0.05 grams of antacid tablet?

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Use the properties of logarithms to expand the expression as a sum,difference,and/or constant multiple of logarithms.(Assume all variables are positive. ) ? Log 5x4y ?

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Find the exact value of the logarithmic expression without using a calculator. ​ 5 ln e7 ​

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Assume that x,y and c are positive numbers.Use the properties of logarithms to write the expression log⁡cx6y4\log _ { c } x ^ { 6 } y ^ { 4 } in terms of the logarithms of x and y. ?

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Rewrite the logarithm log6 412 in terms of the common logarithm (base 10).

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Condense the expression to the logarithm of a single quantity. ? Ln 8 + ln x ?

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Evaluate the logarithm log7 126 using the change of base formula.Round to 3 decimal places.

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Find the exact value of the logarithmic expression without using a calculator.? log⁡773\log _ { 7 } \sqrt [ 3 ] { 7 } ?

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Find the exact value of ln⁡e250−ln⁡e\ln e ^ { 250 } - \ln \sqrt { e } without using a calculator.

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