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derivative gives u gradient of the quadratic
treat equation of derivative as a seperate function
when that function = 0
it means gradient = 0
You might have confused it with the second derivative where it is the gradient of the gradient
Remember
Vertex formula
-b/2a = x cord of vertex or turning point
Dy/dx=0 for stationary point all turning points have gradient of 0
Yes
Just a formula it’s worth knowing
You learn it you may not
Look it up
Np you too
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