Answer:
yes true I once made a post like this but the mods deleted it before I could put it up lol XD
7/g This is the correct answer to your problem
Answer: 1st,2nd, and 4th one are correct.
Step-by-step explanation:
<span>Yes it is true that a continuous function that is never zero on an interval never changes sign on that interval. This is because of ever important Intermediate Value Theorem.</span>
