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3 years ago

The value -2 is a lower bound for the zeros of the function shown below.

Mathematics

1 answer:

Juliette [100K]3 years ago

4 0

Answer:

a) true

Step-by-step explanation:

The bottom-line numbers from synthetic division <em>alternate signs</em>, indicating that -2 is a lower bound. The given statement is true.

If the signs were all positive, it would indicate the proposed zero is an <em>upper bound</em>.

A graph shows all real zeros are greater than -2.

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slamgirl [31]

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Step-by-step explanation:

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mixer [17]

Answer:

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Step-by-step explanation:

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3 years ago

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Dominik [7]

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2 years ago

In a flight of 600 km, the speed of the aircraft was slowed down due to bad weather. The average speed of the trip was decreased

UkoKoshka [18]

The average speed would be 600 km/hr.

Step-by-step explanation:

Let the original speed be 'x'

Let the decreased speed be 'x-200'

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According to question, it becomes,

$\dfrac{600}{x-200}-\dfrac{600}{x}=\dfrac{30}{60}\\\\\dfrac{x-(x-200)}{x^2-200x}=\dfrac{1}{2\times 600}\\\\\dfrac{200}{x^2-200x}=\dfrac{1}{1200}\\\\240000=x^2-200x\\\\x^2-200x-240000=0\\\\x=600,-400$

So, The average speed would be 600 km/hr.

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2 years ago