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Mrac [35]
3 years ago
11

Determine the longest interval in which the given initialvalue problemis certainto have a unique twicedifferentiable solution. D

o not attempt to find the solutionty'' + 3y = t, y(1) = 1, y'(1) = 9
Mathematics
1 answer:
AlekseyPX3 years ago
6 0

Answer:

t_o = 3, so solution exists on (0,4).  

Step-by-step explanation:

Use Theorem

Divide equation with t(t — 4).

y''+[3/(t-4)]*y'+ [4/t(t-4)]*y=2/t(t-4)

p(t)=3/t-4—> continuous on (-∞, 4) and (4,∞)

q(t) = 4/t(t-4) —> continuous on (-∞,0), (0,4) and (4, ∞)

g(t) = 2/t(t-4)—> continuous on (-∞, 0), (0,4) and (4,∞)

t_o = 3, so solution exists on (0,4).  

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54°

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Tan^4x-sec^4x=1-2 sec^2(x)<br> verify
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3 years ago
A survey of pet owners found that on average, they spend $1,225 annually per pet, with a standard deviation of $275. Between whi
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8 0
3 years ago
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The area of a rectangular patio is 400 square feet. The length of the patio is 9 feet more than its width. Find the length and w
oksano4ka [1.4K]

Answer:

Length: 16 feet

Width: 25 feet

Step-by-step explanation:

Alright so let's set up our system:

The area of a rectangular patio is 400 square feet.: L*W = 400

The length of the patio is 9 feet more than its width: L = W - 9

If you look here, all we need to do now is plug in L and solve.

(W - 9)W = 400

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You can attempt to factor this in a number of ways. I recommend a factor tree, but however you do that is fine.

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So now we plug in 25 in our second equation to get L:

L = 25 - 9

L = 16

And now we have both our answers!

4 0
3 years ago
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