## ta123 4 years ago need help on the attachment

1. ta123

2. satellite73

3. hoda

hkd d d d d d d dddddd i

4. ta123

I'm nut sure but did you check all the graphs to make sure your first answer was correct

5. ta123

oops! I misspelled not to nut,

6. ta123

satellite where you at?

7. satellite73

i only saw three graphs. are there more?

8. ta123

yes

9. ta123

there 5 graphs to choose from

10. hoda

hi

11. satellite73

ok it is still b i think

12. satellite73

you know that the second derivative is always positive. this tells you that the function is always concave up

13. satellite73

4 and 5 both have parts that are concave down. so they are out as well.

14. ta123

15. satellite73

yeah i see them now. 3, 4, 5 all have parts that are concave down, but you are told that \[f''(x)>0\] for all x not equal 0, so your function must be concave up

16. satellite73

only 1 and 2 are always concave up, so it has to be the second one for the reason i stated earlier

17. ta123

Thanks I could you help me on a similar problem dealing with finding the relative minimum on a graph

18. ta123

19. GoBlue

Relative min is where the function changes from decreasing to increasing, or where the derivative changes from negative to positive.

20. ta123

correct