From e8411f0a070acef7b3e61a602c50576acad47b4a Mon Sep 17 00:00:00 2001 From: eggy Date: Tue, 17 Nov 2020 17:52:22 -0500 Subject: [PATCH] math: that's not the second deriv test --- docs/mhf4u7.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/mhf4u7.md b/docs/mhf4u7.md index 8c03209..7737ed3 100644 --- a/docs/mhf4u7.md +++ b/docs/mhf4u7.md @@ -594,7 +594,7 @@ To find the extrema of a **continuous** function $f(x)$, where $x=a$ is a critic - An interval is **concave up** if it increases from left to right and tangent lines are drawn below the curve, so $f´´(x)>0$. It is shaped like a smile. - An interval is **concave down** if it increases from left to right and tangent lines are drawn **above** the curve, and $f´´(x)<0$. It is shaped like a frown. -Changes in concavity only occur at points of inflection, and their specific points can be identified using the **second derivative test**, which follows many of the same steps as the first derivative test but with the second derivative. +Changes in concavity only occur at points of inflection. ## Resources