Problem 79
Use a graphing utility and the change-of-base property to graph each function. y = log3 x
Problem 81
Use a graphing utility and the change-of-base property to graph each function. y = log2 (x + 2)
Problem 81
Evaluate or simplify each expression without using a calculator. log 100
Problem 81
Solve each logarithmic equation in Exercises 49–92. Be sure to reject any value of x that is not in the domain of the original logarithmic expressions. Give the exact answer. Then, where necessary, use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. 2 log x=log 25
Problem 82
Expand:
Problem 83
Solve each logarithmic equation in Exercises 49–92. Be sure to reject any value of x that is not in the domain of the original logarithmic expressions. Give the exact answer. Then, where necessary, use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. log(x+4)−log 2=log(5x+1)
Problem 83
In Exercises 83–88, let logb 2 = A and logb 3 = C and Write each expression in terms of A and C.
logb (3/2)
Problem 83
Evaluate or simplify each expression without using a calculator. log 107
Problem 84
Use the formula for continuous compounding to solve Exercises 84–85. How long, to the nearest tenth of a year, will it take $50,000 to triple in value at an annual rate of 7.5% compounded continuously?
Problem 85
In Exercises 83–88, let logb 2 = A and logb 3 = C and Write each expression in terms of A and C.
logb 8
Problem 85
Evaluate or simplify each expression without using a calculator. 10log 33
Problem 85
Solve each logarithmic equation in Exercises 49–92. Be sure to reject any value of x that is not in the domain of the original logarithmic expressions. Give the exact answer. Then, where necessary, use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. 2 log x−log 7=log 112
Problem 85
Use the formula for continuous compounding to solve Exercises 84–85. What annual rate, to the nearest percent, is required for an investment subject to continuous compounding to triple in 5 years?
Problem 87
Solve each logarithmic equation in Exercises 49–92. Be sure to reject any value of x that is not in the domain of the original logarithmic expressions. Give the exact answer. Then, where necessary, use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. log x+log(x+3)=log 10
Problem 87
Evaluate or simplify each expression without using a calculator. In 1
Problem 87
Let logb 2 = A and logb 3 = C and Write each expression in terms of A and C. logb √(2/27)
Problem 88
Evaluate or simplify each expression without using a calculator. In e
Problem 89
Evaluate or simplify each expression without using a calculator. In e6
Problem 89
Solve each logarithmic equation in Exercises 49–92. Be sure to reject any value of x that is not in the domain of the original logarithmic expressions. Give the exact answer. Then, where necessary, use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. ln(x−4)+ln(x+1)=ln(x−8)
Problem 91
Evaluate or simplify each expression without using a calculator. In (1/e6)
Problem 91
Solve each logarithmic equation in Exercises 49–92. Be sure to reject any value of x that is not in the domain of the original logarithmic expressions. Give the exact answer. Then, where necessary, use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. ln(x−2)−ln(x+3)=ln(x−1)−ln(x+7)
Problem 91
In Exercises 89–102, determine whether each equation is true or false. Where possible, show work to support your conclusion. If the statement is false, make the necessary change(s) to produce a true statement. log4 (2x3) = 3 log4 (2x)
Problem 92
Determine whether each equation is true or false. Where possible, show work to support your conclusion. If the statement is false, make the necessary change(s) to produce a true statement. ln(8x3) = 3 ln (2x)
Problem 92
n Exercises 92–93, rewrite the equation in terms of base e. Express the answer in terms of a natural logarithm and then round to three decimal places. y = 73(2.6)^x
Problem 92
Graph f(x) = 2x and its inverse function in the same rectangular coordinate system.
Problem 93
Evaluate or simplify each expression without using a calculator. eln 125
Problem 93
n Exercises 92–93, rewrite the equation in terms of base e. Express the answer in terms of a natural logarithm and then round to three decimal places. y = 6.5(0.43)^x
Problem 93
Solve each equation. 52x ⋅ 54x=125
Problem 93
In Exercises 89–102, determine whether each equation is true or false. Where possible, show work to support your conclusion. If the statement is false, make the necessary change(s) to produce a true statement.
x log 10x = x2
Problem 94
Solve each equation. 3x+2 ⋅ 3x=81
Ch. 4 - Exponential and Logarithmic Functions
