What can I really conclude about my answer? (derivatives)

[Alexmcom]

Okay so we have (3x+2)(2x^2-1) which is part A

I find the derivative of this which is 18x^2+8x-3



Okay on part 2 I decide the simplify the original function (3x+2)(2x^2-1) which comes out as 6x^3-3x+4x^2. I then decide to use the sum and difference rule. So I use 6x^3-3x+4x^2 and apply sum and difference rule. I end up with 18x^2+8x-3.

It is basically a cycle back to the derivative answer of the first stage.What can I really say about this? Could I state that simplifying the function and using the sum and difference rule is a longer route? What would be a sensible conclusion to this?

 

[Deleted member 4993]

Okay so we have (3x+2)(2x^2-1) which is part A

I find the derivative of this which is 18x^2+8x-3



Okay on part 2 I decide the simplify the original function (3x+2)(2x^2-1) which comes out as 6x^3-3x+4x^2. I then decide to use the sum and difference rule. So I use 6x^3-3x+4x^2 and apply sum and difference rule. I end up with 18x^2+8x-3.

It is basically a cycle back to the derivative answer of the first stage.What can I really say about this? Could I state that simplifying the function and using the sum and difference rule is a longer route? What would be a sensible conclusion to this?

Can you please post the EXACT problem as it was given ti you?

 

[stapel]

Okay so we have (3x+2)(2x^2-1) which is part A

"Part A" implies that this was the first question in some multi-part exercise. What was the original problem statement? How did you derive this answer to Part A?

I find the derivative of this which is 18x^2+8x-3

Why did you take the derivative of your answer to Part A? Were you instructed to do so in Part B?

Okay on part 2....

What was "Part 1"? Is this a different exercise, or were Part A and Part B parts of Part 1?

I decide the simplify the original function (3x+2)(2x^2-1) which comes out as 6x^3-3x+4x^2.

Why? What were you instructed to do?

I then decide to use the sum and difference rule.

What "sum and different rule"? "Use" it for what? Why?

I end up with 18x^2+8x-3.

How? What are you doing?

What can I really say about this?

On what basis have you decided that you need to "say" something "about this"? And, by the way, what is the "this" about which you want to "say" something?

When you reply, please include the full and exact text of the exercise(s), the complete instructions, and a clear statement of your thoughts and all of your steps, so we can try to understand what you're talking about. Thank you!

 

[Alexmcom]

Can you please post the EXACT problem as it was given ti you?

ahhh sorry here it is

 

[Alexmcom]

"Part A" implies that this was the first question in some multi-part exercise. What was the original problem statement? How did you derive this answer to Part A?


Why did you take the derivative of your answer to Part A? Were you instructed to do so in Part B?


What was "Part 1"? Is this a different exercise, or were Part A and Part B parts of Part 1?


Why? What were you instructed to do?


What "sum and different rule"? "Use" it for what? Why?


How? What are you doing?


On what basis have you decided that you need to "say" something "about this"? And, by the way, what is the "this" about which you want to "say" something?

When you reply, please include the full and exact text of the exercise(s), the complete instructions, and a clear statement of your thoughts and all of your steps, so we can try to understand what you're talking about. Thank you!

Sorry I should have included it!

Here are the questions