Need a check on a simple derivative question

[mesa]

Homework Statement

If f(t)=(4t+2)/(t+3) what is f'(t)=?

The Attempt at a Solution

I got 10/(t+3)^2 but my professor insists it is 6/(t+7)^2, I know this is a simple question but I don't know where I am going wrong.

 

[skiller]

You are correct.

 

[Mark44]

Homework Statement

If f(t)=(4t+2)/(t+3) what is f'(t)=?

The Attempt at a Solution

I got 10/(t+3)^2 but my professor insists it is 6/(t+7)^2, I know this is a simple question but I don't know where I am going wrong.

The denominator in the derivative can't possibly be (t + 7)². Make sure that you and your instructor are working the same problem.

 

[mesa]

The denominator in the derivative can't possibly be (t + 7)². Make sure that you and your instructor are working the same problem.

That's what I told him but he has a problem listening to anyone who doesn't have Phd after their name, this is going to be fun lol!

Thanks for the verification!

 

[skiller]

That's what I told him but he has a problem listening to anyone who doesn't have Phd after their name, this is going to be fun lol!

Thanks for the verification!

I often had a "fight" with my lecturers (many of whom were professors) at university and often came out on top.

So please pursue this!

In a calm manner, of course...

 

[mesa]

I often had a "fight" with my lecturers (many of whom were professors) at university and often came out on top.

So please pursue this!

In a calm manner, of course...

Oh I'm going to pursue it, this is the 'fun' part of going back to school :)

I've always been polite, although during the summer session one of my Professors asked me to please not sign up for any of his classes again, ha ha!