Solving a Math Puzzle: What Went Wrong?

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Homework Help Overview

The discussion revolves around a math puzzle involving the identification of correct answers related to a graph and its tangent line. The original poster expresses confusion over their selections, particularly regarding the differentiation of a function.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to reason through their selections, questioning the validity of their answers and the logic behind their choices. Some participants clarify concepts related to the tangent line and differentiation, while others suggest the possibility of multiple correct answers.

Discussion Status

The discussion is ongoing, with participants providing clarifications and insights into the problem. There is an acknowledgment of potential confusion in the problem setup, and some guidance has been offered regarding the use of repeated answers.

Contextual Notes

The original poster indicates uncertainty about the correctness of their answers and the implications of using the same answer more than once. There may be assumptions about the problem's complexity that are being questioned.

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Homework Statement


http://img121.imageshack.us/img121/8907/graphr.jpg


Homework Equations





The Attempt at a Solution


i can't believe i got this wrong.. i even checked the textbook for that and still got it wrong :/
B,C,D,E are 100% correct.
the other 2 i logically matched them..
increment of x obviously going to be F
and the tangent line, or the differentiable of y is A
so what's wrong?
 
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dy and Differential of y are the same thing.

A is the line, whose equation would be y - y0 = f'(x0)(x - x0), where (x0, y0) is the point where the line is tangent to the curve, and f'(x0) is the slope of the tangent line. Other notation for f'(x0) is [tex]\frac{dy}{dx}|_{x = x_0}[/tex].
 
oh i didnt know i can use the same answer twice.. i was thinking that too but then i thought it would be wrong with 2 of the same answers..

thanks man
 
I think they got tricky on you.
 

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