My course

The answers do not show the infinity sign. All Im able to see is this: (-, )

Great reasoning.

At around 0:40, Callie explains that 150 is a constant. We isolate the constant before the derivation. We don't derive constants.

When we derive 4x , we isolate 4, then derive x.

When multiply a function by a constant, we keep the constant without doing anything.

Nothing to do with the previous video, please add a connecting video to to dis, as the video explaining this says " as we talked about last time" nope, it doesn't talk about it , if anything its misleading