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## #1 2016-06-01 12:55:27

Mathegocart
Member
Registered: 2012-04-29
Posts: 1,882

### Quickies #1 Math

1. bobbym and his neighbor is having a competition on who can type faster with a sharper head
bobbym's speed is : x^3 - 2x
his neighbor's speed: 3x^2
Find the time in seconds, x, where bobbym will overcome(type more) than his neighbor
2. Find the minimum value where x is part of the real numbers
$2^x+3^x+4^x-x^3+10$
3. The sum of the roots of the equation 2x^2+4x-6 minus the product of the roots are..
4. Calculate the difference in temperature between the water at the top and bottom of a water fall 100 m high. Specific heat capacity of water is 4200 J/kg k.(consider g=9.8).
5.An elevator starts from rest with a constant upward acceleration. It moves 2 m in the first 0.6 s. bobbym is holding a 300 kg package by a vertical string. The tension in the string during acceleration is (Take g = 9.8 m/s2)

The integral of hope is reality.

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## #2 2016-06-01 13:22:48

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Quickies #1 Math

Hi;

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #3 2016-06-01 18:45:58

Relentless
Member
Registered: 2015-12-15
Posts: 624

### Re: Quickies #1 Math

Hey;

1. I agree with bobbym

Last edited by Relentless (2016-06-01 18:47:51)

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## #4 2016-06-02 00:22:25

Member
Registered: 2016-04-16
Posts: 1,086

### Re: Quickies #1 Math

mathgogocart wrote:

1. bobbym and his neighbor is having a competition on who can type faster with a sharper head
bobbym's speed is : x^3 - 2x
his neighbor's speed: 3x^2
Find the time in seconds, x, where bobbym will overcome(type more) than his neighbor
2. Find the minimum value where x is part of the real numbers
https://latex.codecogs.com/gif.latex?2%5Ex&plus;3%5Ex&plus;4%5Ex-x%5E3&plus;10
3. The sum of the roots of the equation 2x^2+4x-6 minus the product of the roots are..
4. Calculate the difference in temperature between the water at the top and bottom of a water fall 100 m high. Specific heat capacity of water is 4200 J/kg k.(consider g=9.8).
5.An elevator starts from rest with a constant upward acceleration. It moves 2 m in the first 0.6 s. bobbym is holding a 300 kg package by a vertical string. The tension in the string during acceleration is (Take g = 9.8 m/s2)

{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}

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## #5 2016-06-02 04:41:11

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Quickies #1 Math

Hi;

Lots of times I have to figure which answer I think the OP wants. I assumed he wanted the point where my speed overtook and passed the speed of the other guy with a sharpened head.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #6 2016-06-03 09:01:48

Mathegocart
Member
Registered: 2012-04-29
Posts: 1,882

### Re: Quickies #1 Math

The nth term of a sequence is defined as
$(-1)^n-(-1)^{n+1}-(-1)^{n+2}.....$.
What is the sum of the first 2009 terms, i.e, n = 2009.

The integral of hope is reality.

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## #7 2016-06-03 11:19:20

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Quickies #1 Math

Hi;

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #8 2016-06-04 16:09:59

Member
Registered: 2016-04-16
Posts: 1,086

### Re: Quickies #1 Math

{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}

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