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adoni [48]
3 years ago
14

The sum of 5 consecutive integers is 270

Mathematics
1 answer:
antiseptic1488 [7]3 years ago
4 0
Hello!

This can be written as

(x) + (x + 1) + (x + 2) + (x + 3) + (x + 4) = 270

Add all the values

5x + 1 + 2 + 3 + 4 = 270

Combine like terms

5x + 10 = 270

Subtract 10 from both sides

5x = 260

Divide both sides by 5

x = 52

So the numbers are 52, 53, 54, 55, 56,

Hope this helps!
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You throw a ball up and its height h can be tracked using the equation h=2x^2-12x+20.
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<em><u>This problem seems to be wrong because no minimum point was found and no point of landing exists</u></em>

Answer:

1) There is no maximum height

2) The ball will never land

Step-by-step explanation:

<u>Derivatives</u>

Sometimes we need to find the maximum or minimum value of a function in a given interval. The derivative is a very handy tool for this task. We only have to compute the first derivative f' and have it equal to 0. That will give us the critical points.

Then, compute the second derivative f'' and evaluate the critical points in there. The criteria establish that

If f''(a) is positive, then x=a is a minimum

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1)

The function provided in the question is

h(x)=2x^2-12x+20

Let's find the first derivative

h'(x)=4x-12

solving h'=0:

4x-12=0

x=3

Computing h''

h''(x)=4

It means that no matter the value of x, the second derivative is always positive, so x=3 is a minimum. The function doesn't have a local maximum or the ball will never reach a maximum height

2)

To find when will the ball land, we set h=0

2x^2-12x+20=0

Simplifying by 2

x^2-6x+10=0

Completing squares

x^2-6x+9+10-9=0

Factoring and rearranging

(x-3)^2=-1

There is no real value of x to solve the above equation, so the ball will never land.

This problem seems to be wrong because no minimum point was found and no point of landing exists

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