1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alexxx [7]
3 years ago
6

I need help with a calculus 2 exercise, with a good explanation to what I'm trying to figure out.

Mathematics
1 answer:
Karolina [17]3 years ago
3 0
<h3>Explanation:</h3>

When writing rational expressions, you need to be aware that ...

  1/4x = (1/4)x ≠ 1/(4x)

Parentheses around the denominator are required, unless you're typesetting the expression and can use a fraction bar for grouping.

The derivative of the curve expression is ...

  y' = x - 1/(4x) . . . . . parentheses added to what you wrote

and the expression (1 -(y')^2) can be written ...

  1 -(y')^2 = x^2 +1/2 +1/(16x^2) . . . . . parentheses added to what you wrote

The first and last terms of this trinomial are both perfect squares, so you might suspect the whole trinomial is a perfect square. You recall that ...

  (a +b)^2 = a^2 + 2ab + b^2

This is a good "pattern" to remember. Using it is a matter of <em>pattern recognition</em>, as is the case with a lot of math.

Here, you have ...

  a = x

  b = 1/(4x)

In order for your trinomial to be a perfect square, the product 2ab must equal the middle term of your trinomial. (Spoiler: it does.)

  2ab = 2(x)(1/(4x)) = (2x)/(4x) = 1/2 . . . . . matches the middle term of 1 -(y')^2

Hence your trinomial can be written as the square ...

  1 -(y')^2 = (x +1/(4x))^2

_____

This is convenient because you want to integrate the square root of this. Your integral then becomes ...

\displaystyle\int\limits_{2}^{4}{\left(x+\frac{1}{4x}\right)\,dx

You might be interested in
What's the step by step progress for writing 14.35 in scientific notation​
Dmitry [639]

For scientific notation, you always want 1 digits in front of the decimal.

Ex) 7.39*10^5

Move the decimal point in between the 1 and 4, or 1 place to the left.

1.435

Since the decimal point was moved 1 place to the left, the exponent after 10 will be 1.

1.435*10^1

1.435*10^1 is your final answer.

1.435*10 is the same thing also.

7 0
3 years ago
The sales of lawn mowers t years after a particular model is introduced is given by the function y = 5500 In(9t+4), where y is t
Zina [86]
20875.2 All you have to do is plug in the numbers to the equation.
4 0
3 years ago
The quotient of 10 plus x and y minus 3?
Ierofanga [76]
(10 + x) / (y - 3)....quotient is the result of division
5 0
3 years ago
How to show my work when I have a math problem
Over [174]

Answer:

Here is how

Step-by-step explanation:

You find your answer to the problem and explain how do did it or you write the steps of how you did the problem. Also put your answer.

5 0
3 years ago
What is the place value of the 8 in 281,480,100 ?
barxatty [35]
The place value 8 in 281,480,100 is the 10th. And it is the same way in the other problem. How you get your answer is by counting like this EX: 1, 10, 100, 1,000, 10,000, 100,000... And so on.
3 0
3 years ago
Other questions:
  • Two cables were attached to the top of a pole and anchored to the ground on opposite sides of the pole. What is the length of th
    9·1 answer
  • CALCULATING PERCENTAGES QUESTION. Please help me solve this question.
    12·1 answer
  • A book is on sale for $6 off of the regular $24 price. What percent is the discount? [Type your answer as a number.] Also please
    15·2 answers
  • Solving fraction equations:  Write the solution in simplest form   6 1/4 = z + 1 5/8
    10·2 answers
  • The area of the shape
    12·1 answer
  • Harry’s dog weighs 2 7/8 pounds what is his weight in decimal form
    8·1 answer
  • Write equivalent expressions in factored form
    9·1 answer
  • 8 × 10^-3 in standard form
    7·1 answer
  • Malloy solved the equation −5x − 16 = 8; his work is shown below. Identify the error and where it was made. −5x − 16 = 8 Step 1:
    14·2 answers
  • Please help, I'm so close to finishing all these.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!