Harsh grading or not? Argue with prof?

[Lagraaaange]

I lost 10% or half of the points for a Fourier series problem because I forgot to include an "x" into argument of sin (pi). Is it just me or is this an excessive deduction of points?

 

[axmls]

It seems a little harsh. Did you include it in future calculations correctly? Was it the final answer?

If it was your final answer, you really have no case there. They're two separate answers.

That said, many of my professors assign points for each part of the problem, so that em getting everything correct but entering it into the calculator wrong would be only 1 point off or so. Different professors have different rules, though, and unless it was exorbitantly unfair or you really got it right, it's hard to argue for more points.

 

[Choppy]

Without the full question it's hard for anyone to make a call on whether something was harsh grading or not. Omitting a variable in a function like that is obviously going to make something into a zero, and so it's possible that the consequence of that, even if carried through correctly put you into a situation where you didn't have to deal with about half of the problem - at least from a mark allotment point of view.

The way to deal with something like this is to go in during office hours and simply ask the professor to explain what you missed. This helps you to learn from the mistake and allows you to open a dialogue about the problem without challenging or arguing with the prof. (Often, students who come in with a confrontational attitude are met with a stonewall.)

 

[Mark44]

I lost 10% or half of the points for a Fourier series problem because I forgot to include an "x" into argument of sin (pi). Is it just me or is this an excessive deduction of points?

How do you figure that 10% is half the points?

Without x, $\sin(\pi) = 0$. Without seeing your work, it's hard to tell if the points deducted were excessive. Also, many instructors will give partial credit if they think you're on the right track, but a few give credit only when the answer is correct. Hard to say without more information.

 

[Vanadium 50]

Did you then simplify it to zero? I would have taken more points off for that.

 

[Lagraaaange]

Its was an expression for a sawtooth wave. I did all the work right but then forgot to add the x in the definition of a Fourier Series: I had the Bn coefficient but forgot the x in sin(npix)

 

[Dishsoap]

Its was an expression for a sawtooth wave. I did all the work right but then forgot to add the x in the definition of a Fourier Series: I had the Bn coefficient but forgot the x in sin(npix)

But was it just a writing error - that is, did you include it on the next line? Or did you simplify the whole thing to zero? Because if the latter is the case, then you absolutely made a huge mistake and losing 50% isn't unreasonable.

 

[micromass]

Seems fair to me.

 

[Vanadium 50]

I agree with Micromass. You were asked for a function of x. You didn't write a function of x. Hard to get a lot of points in that situation.