Remember that the first derivative is just the SLOPE of the curve you have there. For the first little bit, the slope appears to be nearly constant. Then it starts to decrease. Eventually the slope reaches 0. It continues to decrease and goes to some roughly constant negative value. Then it increases again and reaches 0. Etc. etc.
The intervals are going by ones.
The Attempt at a Solution
Well for the first derivative, I'm guessing from -infinity to -1, it's a decreasing line?
Also from -1 to 1....it's a constant negative line? I dunno
Thanks for calling my attention the thread title, cepheid. But agv567, that's not right. And your blurry not very good sketch of the first derivative at least shows that it's sometimes decreasing and sometimes increasing. Doesn't that mean the the second derivative can't be positive everywhere?Yeah thanks guys, I got it. The answer is TRUE by the way, The 2nd derivative is positive throughout,