Concept explainers
Using d Geometric Series In Exercises 67 and 68, (a) find the common ratio of the geometric series, (b) write the function that gives the sum of the series, and (c) use a graphing utility to graph the function and the partial sums.
and
What do you notice?
Trending nowThis is a popular solution!
Chapter 9 Solutions
Student Solutions Manual for Larson/Edwards' Calculus of a Single Variable, 11th
- A geometric sequence has the first term a1=3 and common ratio r=12 What is the 8thterm?arrow_forwardPollution A chemical plant discharges 2400 tons of pollutants every year into an adjacent lake. Through natural runoff, 70% of the pollutants contained in lake at the beginning of the yare are expelled by the end of the year. (a) Explain why following sequence models the An. of the pollutant in the lake at the end of the nth year that the plant is operating. An=0.30An1+2400 (b) Find the first five terms of the sequence An. (c) Find a formula for An. (d) How much of the pollutant remains in the lake after 6 years? How much will remain after the plant has been operating a long time? (e) Verify to part (d) by graphing An with a graphing calculator for n=1ton=20.arrow_forwardA geometric sequence is a sequence in which the _______________ of successive terms is constant.arrow_forward
- Pollution A chemical plant discharges 2400tons of pollutants every year into an adjacent lake. Through natural runoff, 70 of the pollutants contained in the lake at the beginning of the year are expelled by the end of the year. a Explain why the following sequence models the amount An of the pollutant in the lake at the end of the nthyear that the plant is operating. An=0.30an1+2400 b Find the first five terms of the sequence An. c Find a formula for An. d How much of the pollutant remains in the lake after 6years? How much will remain after the plant has been operating a long time? e Verify your answer to part d by graphing An with a graphing calculator for n=1 to n=20.arrow_forwardDepreciation A paper manufacturer buys a machine for $120,000. It depreciates at a rate of 30 per year. (In other words, at the end of each year the depreciated value is 70 of what it was at the beginning of the year.) (a) Find the formula for the nth term of a geometric sequence that gives the value of the machine t full years after it is purchased. (b) Find the depreciated value of the machine after 5 full years.arrow_forwardSalaryA Colleague of the teacher in Exercise 29, hired at the same time, makes $35,000 in her first year and gets a $1200 raise each year. (a) What is her salary Anin her nth year at this school? (b) Find her salary in her eighth year at this school, and compare it to the salary of the teacher in Exercise 29 in his eighth year.arrow_forward
- Find the requested term of each geometric sequence. Find the sixth term of the geometric sequence whose first three terms are 14, 1, and 4.arrow_forwardMonthly Savings Program Alice opens a savings account that pay 3% interest per year, compounded monthly. She begins by depositing $100 at the start of the first month and add $100 at the end of each month, when the interest is credited. Find a recursive formula for the amount An in her account at the end of the nth month. (Include the interest credited for that month and her monthly deposit.) Find the first five terms of the sequence An . Use the pattern you observed in (b) to find a formula for An . [Hint: To find the pattern most easily, it’s best not to simplify the terms too much.] How much has she saved after 5 years?arrow_forwardMonthly Savings Program Alice opens a savings account that pays 3 interest per year, compounded monthly. She begins by depositing 100 at the start of the first month and adds 100 at the end of each month, when the interest is credited. a Find a recursive formula for the amount An in her account at the end of the nth month. Include the interest credited for that month and her monthly deposit. b Find the first five terms of the sequence An. cUse the pattern you observed in b to find a formula for An Hint: To find the pattern most easily, its best not to simplify the terms too much. d How much has she saved after 5years?arrow_forward
- Algebra and Trigonometry (MindTap Course List)AlgebraISBN:9781305071742Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage LearningCollege AlgebraAlgebraISBN:9781305115545Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage Learning
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillAlgebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageCollege Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning