Hello,
y=2xe^x
y'=2(e^x+xe^x)=2(x+1)e^x
y''=2(e^x+(x+1)e^x)=2(x+2)e^x
x |-infinite -2 0 +infinite
e^x | ++++++++++++++++++
x+2 |------------0 +++++++++++
y'' | -----------0 +++++++++++
y''<0 if x<-2
<span>The interval on which the graph is concave down is (-infinite -2[</span>
Even numbers end with 2,4,6,8, or 0. Thus, 28 is the even number.
Answer:
$26.43
Step-by-step explanation:
A pound = $1.81. Multiply the price per pound by however many pounds Shelly is buying.
Answer:
integers
Step-by-step explanation:
hope this is helpful
