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CALCULATE GRADIENT OF CURVE

B1977 · 2008-10-26 11:50:42

without drawing graph calculate gradient of the curve y=3xsquared+2x+7=0 at the point where x= -2 can you use y=mx+c:confused:

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26-10-2008 12:50pm

#1

B1977

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without drawing graph calculate gradient of the curve y=3xsquared+2x+7=0
at the point where x= -2

can you use y=mx+c

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#2 26-10-2008 1:30pm
JSK 252

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Just dy/dx the curve and fill it in for x= -2

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#3 26-10-2008 1:49pm
Piste

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Does gradient mean slope?

/me fails maths

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#4 26-10-2008 1:59pm
[Deleted User]
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Yah, just differentiate the equation of the curve, fill in -2 for x and there ya go, thats the slope at that point. (At least I think that's what you've to do anyway, I'm probably wrong).

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#5 26-10-2008 2:54pm
insinkerator

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y=3x^2 + 2x +7

differentiating an equation finds the slope of it.

dy= 6x +2
dx

let x= -2

slope of curve at x= -2

6(-2) + 2

-10

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#6 26-10-2008 3:04pm
timmywex

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Tricky question, not hard, just saying gradient instead of slope made it tricky!

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