/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 59 Write the sum without using sigm... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

Write the sum without using sigma notation. $$\sum_{k=3}^{100} x^{k}$$

Short Answer

Expert verified
The sum is written as: \( x^3 + x^4 + x^5 + \ldots + x^{100} \).

Step by step solution

01

Understand the sigma notation

The given sum, \( \sum_{k=3}^{100} x^k \), indicates that we want to add up terms starting with \( x^3 \) and ending with \( x^{100} \). Each term in this sum is of the form \( x^k \) where \( k \) starts at 3 and goes up to 100.
02

Write out the sequence

To express the sum without sigma notation, we need to list each term from the beginning to the end. This means starting with \( x^3 \), then \( x^4 \), and continuing until \( x^{100} \).
03

Express the entire sum as a sequence

Writing the sum without sigma notation involves explicitly listing all the terms added together: \[ x^3 + x^4 + x^5 + ext{...} + x^{100} \]Here, the terms increase in exponent from 3 to 100.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Sequence
In mathematics, a sequence is an ordered list of numbers. When dealing with sequences, each term has a specific position and follows a particular pattern. Understanding sequences is essential when working with computations that involve multiple steps.

In the context of the given problem, the sequence arises from terms presented in sigma notation. Sigma notation is a concise way to represent a series, which is the sum of a sequence. Here, the sequence is \(x^3, x^4, x^5, \ldots, x^{100}\), where each term is related by incrementing the exponent by one. This forms an arithmetic progression.

Recognizing the structure within a sequence helps simplify expressions and evaluates sums more effectively. By breaking down the sequence visually or in list form, you can better understand how each part contributes to the whole. This lays the groundwork for the subsequent summation process.
Exponents
Exponents denote repeated multiplication of a base number. For instance, \(x^3\) means multiplying the base \(x\) by itself three times: \(x \times x \times x\). This shorthand is invaluable in mathematics for simplifying expressions and calculations.

In the provided problem, each term in the sequence includes an exponent of the variable \(x\). The exponents start from 3 and go up to 100. This incremental pattern is crucial as it dictates the progression of the sequence. By gradually increasing the exponent, the problem reflects how repetitive multiplication can expand numbers rapidly.

Understanding how exponents function enables you to manipulate mathematical expressions more easily and see patterns that may arise in problem-solving scenarios involving power sums like the one presented here.
Summation
Summation refers to the addition of a sequence of numbers. The sigma notation is a compact form used to specify the sum of a sequence without listing all the terms individually. In mathematics, transforming from sigma notation to an explicit list of terms requires expressing the whole sequence.

In our scenario, we're dealing with the summation of a sequence using the sigma notation \(\sum_{k=3}^{100} x^k \). To write it out without sigma notation, each term from the sequence must be added cumulatively, starting from \(x^3\) and ending at \(x^{100}\). This creates a long addition expression like \(x^3 + x^4 + \ldots + x^{100}\).

Understanding summation helps in evaluating expressions and breaking them into manageable parts. It highlights the importance of process accuracy when generating terms in large expressions, allowing complex operations to reduce down to fundamental arithmetic steps.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Price of a House The median price of a house in Orange County increases by about \(6 \%\) per year. In 2002 the median price was \(\$ 240,000 .\) Let \(P_{n}\) be the median price \(n\) years after 2002 (a) Find a formula for the sequence \(P_{n}\) (b) Find the expected median price in 2010 .

Interest Rate John buys a stereo system for \(\$ 640 .\) He agrees to pay \(\$ 32\) a month for 2 years. Assuming that interest is compounded monthly, what interest rate is he paying?

Determine whether the infinite geometric series is convergent or divergent. If it is convergent, find its sum. $$1-1+1-1+\cdots$$

If \(a_{1}, a_{2}\) \(a_{3}, \ldots\) is a geometric sequence with a common ratio \(r>0\) and \(a_{1}>0,\) show that the sequence $$\log a_{1}, \log a_{2}, \log a_{3}, \dots$$ is an arithmetic sequence, and find the common difference.

All Cats Are Black? What is wrong with the following "proof" by mathematical induction that all cats are black? Let \(P(n)\) denote the statement "In any group of \(n\) cats, if one cat is black, then they are all black." Step 1 The statement is clearly true for \(n=1\) Step 2 Suppose that \(P(k)\) is true. We show that \(P(k+1)\) is true. Suppose we have a group of \(k+1\) cats, one of whom is black; call this cat "Tadpole." Remove some other cat (call it "Sparky") from the group. We are left with \(k\) cats, one of whom (Tadpole) is black, so by the induction hypothesis, all \(k\) of these are black. Now put Sparky back in the group and take out Tadpole. We again have a group of \(k\) cats, all of whomexcept possibly Sparky-are black. Then by the induction hypothesis, Sparky must be black too. So all \(k+1\) cats in the original group are black. Thus by induction \(P(n)\) is true for all \(n .\) since everyone has seen at least one black cat, it follows that all cats are black. PICTURE CANT COPY

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.