
By the fundamental theorem of calculus,

then by standard differentiation,

is concave upward whenever
. The denominator is always positive, so the sign is determined by the numerator alone:

Answer:
+ 2
Step-by-step explanation:
Group:
(2
+ 4x) (-5
- 10)
2x (
+ 2) -5 (
+ 2)
Common binomial factor = (
+ 2)
Answer:
y= 2.08
Step-by-step explanation:
4.58 - 2.5
4.58
- 2.50
-----------
2.08