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DanielleElmas [232]
3 years ago
5

Please help i don’t understanddddd

Mathematics
2 answers:
gogolik [260]3 years ago
7 0
Since she already owns one, and they are priced for 2 for a dollar. She would only need to spend $2 dollars to have for and then she will have 5 in total.
sweet-ann [11.9K]3 years ago
3 0
Asssssssssssssssssssssssssss
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The correct answers are 6/9 and 4/6
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What is the only solution of 2x2 + 8x = x2 – 16?
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What is 80 times 5,000 equal??
AURORKA [14]

Multiply the two numbers

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3 years ago
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One non-negative number is the reciprocal of another number. The sum of the two numbers is a minimum. What are the two numbers
Troyanec [42]

The two numbers are 1 and 1.

Let the non-negative number be x and its reciprocal be y = 1/x

The sum of the two numbers is f(x,y) = x + y

= x + 1/x

= f(x)

For f(x) to be minimum, we differentiate it with respect to x and equate it to zero to find the value of x at which irt is minimum.

So, df(x)/dx = d(x + 1/x)/dx

= dx/dx + d(1/x)/dx

= 1 - 1/x²

Equating it to zero, we have

1 - 1/x² = 0

1 = 1/x²

x² = 1

Taking square-root of both sides, we have

x = ±√1

x = ±1

Since x is non-negative x = + 1

We differentiate f(x) again to determine if this value gives a minimum for f(x).

So, d²f(x)/dx² = d(1 - 1/x²)/dx

= d1/dx - d(1/x²)/dx

= 0 - × (-2/x³)

= 2/x³

Substituting x = 1 into the equation,

d²f(x)/dx² = 2/x³

= 2/1³

= 2 > 0.

So x = 1 is a minimum point for f(x)

Since x = 1 and y = 1/x, y = 1/1 = 1

So, the two numbers are 1 and 1.

Learn more about sum of two numbers here:

brainly.com/question/13854139

5 0
2 years ago
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