Use the given graph off(x) = x^2to find a number (delta) such thatif |x - 1| < (delta) then |x^2-1| < \frac{1}{2}(Round your answer down to three decimal places.)(delta) =1210500781.jpg

Zoe Oneal

Zoe Oneal

Answered question

2021-06-10

Make use of the graph of
f(x)=x2
to find a number (δ) such that
if |x1|<(δ) then |x21|<12
(Round your response to the nearest three decimal places.)
(δ)=

Answer & Explanation

unessodopunsep

unessodopunsep

Skilled2021-06-11Added 105 answers

It may help you

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nick1337

nick1337

Expert2023-05-14Added 777 answers

Step 1: Find the expression for |x21|.
Since f(x)=x2, we can rewrite |x21| as |f(x)f(1)|.
Step 2: Determine the conditions for |f(x)f(1)|<12.
Using the definition of the absolute value, we have 12<f(x)f(1)<12.
Step 3: Express f(x)f(1) in terms of x.
Substituting f(x)=x2 and f(1)=12=1, we get 12<x21<12.
Step 4: Solve the inequality.
Rearranging the inequality, we have 12<x21<12.
To solve this inequality, we can analyze it by splitting it into two separate inequalities:
12<x21 ... (1)
x21<12 ... (2)
Now, let's solve each inequality individually:
Solving inequality (1):
12<x21
Adding 1 to both sides:
12<x2
Taking the square root:
12<|x|
Since we're interested in the distance between x and 1, we can rewrite this as:
|x1|>12
Simplifying the square root:
|x1|>22 ... (3)
Solving inequality (2):
x21<12
Adding 1 to both sides:
x2<32
Taking the square root:
|x|<32
Again, since we're interested in the distance between x and 1:
|x1|<32 ... (4)
Step 5: Determine the maximum value for δ.
To satisfy both conditions (3) and (4), we need to choose the smaller value between 22 and 32.
Therefore, δ=22.
Hence, if |x1|<δ, where δ=22, then |x21|<12.
madeleinejames20

madeleinejames20

Skilled2023-05-14Added 165 answers

Result:
0.293
Solution:
To find the value of δ such that if |x1|<δ, then |x21|<1/2, we can utilize the graph of f(x)=x2.
Let's start by considering the inequality |x21|<1/2. This means that the distance between x2 and 1 should be less than 1/2. We can rewrite this inequality as 1/2<x21<1/2.
Now, let's focus on the right-hand side inequality: x21<1/2. Adding 1 to both sides gives us x2<1+1/2, which simplifies to x2<3/2.
To find δ, we need to determine the interval around x = 1 such that all values of x within this interval satisfy the inequality x2<3/2. Since the graph of f(x)=x2 is symmetric around x = 0 and opens upward, we can consider the distance from x = 1 to the point where x2=3/2.
To find this point, we solve the equation x2=3/2:
x2=32
Taking the square root of both sides, we get:
x=±32
Since we are interested in the interval around x = 1, we take the positive square root:
x=32
To find δ, we take the absolute value of the difference between 1 and the x-coordinate of this point:
δ=|132|
Now, let's compute the value of δ:
δ=|132|0.293
Therefore, the value of δ that satisfies the given condition is approximately 0.293.
Eliza Beth13

Eliza Beth13

Skilled2023-05-14Added 130 answers

We know that the function f(x)=x2 is a quadratic function with a vertex at (0, 0) and it opens upward. The graph of f(x)=x2 is a U-shaped curve.
To find δ, we need to determine the interval around x = 1 where |x21|<1/2 holds true.
Let's start by examining the expression |x21|<1/2:
|x21|<12
We can rewrite the inequality as:
12<x21<12
Next, let's add 1 to all parts of the inequality:
12+1<x21+1<12+1
Simplifying further:
12<x2<32
Now, taking the square root of all parts of the inequality, we have:
12<|x|<32
Since we are interested in the interval around x = 1, we can subtract 1 from each part:
121<|x1|<321
To ensure that |x1|<δ, we need to find a δ that satisfies the above inequality.
Hence, we can choose:
δ=min(121,321)
Therefore, the value of δ that satisfies the given condition is:
δ=121

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