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Postby Hikari_Dreamer_12 on Sun Aug 29, 2010 10:33 pm

Natural numbers can't be negative, so how do you solve something like this:
{the natural numbers between -5 and 4}

Would it be no solution or something? :confused:

What is the equation for:
two-thirds of the way from -11 to 5? And what is two thirds of the way from -11 and 5?


How do you solve something like this:
x(x-2)=0 if the domain is all natural numbers?

A={a,1,2,3} List all of the subsets of A.
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Postby stapel_eliz on Sun Aug 29, 2010 11:36 pm

Hikari_Dreamer_12 wrote:{the natural numbers between -5 and 4}

There are some natural numbers between -5 and 4. List those.

Hikari_Dreamer_12 wrote:two-thirds of the way from -11 to 5?

How far apart are these two numbers? (Hint: Subtract.)

What is one-third of that distance? (Hint: Divide.)

What then is two-thirds of the way from the lower number to the higher number? (Hint: Add.)

Hikari_Dreamer_12 wrote:x(x-2)=0 if the domain is all natural numbers

What is the solution in the real numbers?

What part of this solution, if any, is also in the natural numbers?

Hikari_Dreamer_12 wrote:A={a,1,2,3} List all of the subsets of A.

Where are you stuck on this one?
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Re:

Postby Hikari_Dreamer_12 on Mon Aug 30, 2010 1:00 am

stapel_eliz wrote:
Hikari_Dreamer_12 wrote:two-thirds of the way from -11 to 5?

How far apart are these two numbers? (Hint: Subtract.)

What is one-third of that distance? (Hint: Divide.)

What then is two-thirds of the way from the lower number to the higher number? (Hint: Add.)


Could you please clarify on the last two steps? Like how to do it, with an example or something? :confused:


stapel_eliz wrote:
Hikari_Dreamer_12 wrote:x(x-2)=0 if the domain is all natural numbers

What is the solution in the real numbers?

What part of this solution, if any, is also in the natural numbers?

Does that basically mean any natural numbers that can be fitted in are the answers? But how do you solve it/Is there an easier way?


stapel_eliz wrote:
Hikari_Dreamer_12 wrote:A={a,1,2,3} List all of the subsets of A.

Where are you stuck on this one?

What's a subset? What IS the subset of A?
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  TOPIC_SOLVED

Postby stapel_eliz on Mon Aug 30, 2010 9:55 am

1) Divide by 3 to find "one-third of the distance". If you're not sure where to go from there, try drawing the picture.

2) To learn how to solve quadratic equations, try here.

3) To get started on learning what sets and subsets are, try here.
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