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A series of monomials: Find all values of x for which the seriesk=1x2kk!. converges.

Short Answer

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Step by step solution

01

Step 1. Given Information.

a

02

Step 2. Values of x.

a

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Most popular questions from this chapter

Prove Theorem 7.24 (a). That is, show that if c is a real number andk=1ak is a convergent series, then k=1cak=ck=1ak.

Leila, in her capacity as a population biologist in Idaho, is trying to figure out how many salmon a local hatchery should release annually in order to revitalize the fishery. She knows that ifpksalmon spawn in Redfish Lake in a given year, then only 0.2pkfish will return to the lake from the offspring of that run, because of all the dams on the rivers between the sea and the lake. Thus, if she adds the spawn from h fish, from a hatchery, then the number of fish that return from that run k will be pk+1=0.2(pk+h)..

(a) Show that the sustained number of fish returning approaches p=hk+10.2kas k→∞.

(b) Evaluate p.

(c) How should Leila choose h, the number of hatchery fish to raise in order to hold the number of fish returning in each run at some constant P?

Given a series k=1ak, in general the divergence test is inconclusive when . For a ak0geometric series, however, if the limit of the terms of the series is zero, the series converges. Explain why.

Explain why, if n is an integer greater than 1, the series k=11kn diverges.

For each series in Exercises 44–47, do each of the following:

(a) Use the integral test to show that the series converges.

(b) Use the 10th term in the sequence of partial sums to approximate the sum of the series.

(c) Use Theorem 7.31 to find a bound on the tenth remainder,R10.

(d) Use your answers from parts (b) and (c) to find an interval containing the sum of the series.

(e) Find the smallest value of n so thatRn10-6

k=11k2

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