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>
Answer: 5x-30-9
-159
Step-by-step explanation:
-159 is the answer
Hello,
This is simple :)
<span>First divide:
How many times does 16 go into 7? : 0
7 GOES into 16, 0 times, now we have ; 0.
Next, multiply 16(0):0
Now, subtract 7-0
=7
Bring 0 down... so now we have 70... how many times can you divide 16 into 70? : about 4 times.
Now we have: 0.4
Multiple 16 by 4
= 64 : SUBTRACT 64 from 70
=60
Bring Down: 0; this gives us 60.
Divide:
How many times can 16 go into 60? : About 7 times
No we have : 0.437..
Bring down 0; gives us 600: how many times can 16 go into 600?: About 5 times.
Now, we have 0.4375.
Thus, 7/16 = 0.4375.
Faith xoxo
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