- #1

- 13

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what i know:

- we have to use m=[f(a+h)-f(a)]/h

- if we change the equation we can get 3x^4 - 15x^2 -12

- the slope of the tangent is zero.

THANX

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- Thread starter kiss89
- Start date

- #1

- 13

- 0

what i know:

- we have to use m=[f(a+h)-f(a)]/h

- if we change the equation we can get 3x^4 - 15x^2 -12

- the slope of the tangent is zero.

THANX

- #2

jtbell

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hint: how does the derivative of a function relate to the slope of the tangent of its graph?

- #3

Gib Z

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Find the derivative, and set it equal to the slope of a horizontal line. What is that?

- #4

HallsofIvy

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- #5

jtbell

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Find the derivative, and set it equal to the slope of a horizontal line. What is that?

Do you mean, "what is the slope of a horizontal line?"

Draw a graph that shows a horizontal line. Pick two points [itex](x_1,y_1)[/itex] and [itex](x_2,y_2)[/itex] on the line. Do you know how to calculate the slope of a line from two points?

- #6

Gib Z

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yes thats what i meant, but i knew the answer..set the derivative to zero is what i meant

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