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Damm [24]
3 years ago
10

How do you solve: f(x) = -x2e-x +2xe-x , finding the zero's of f.

Mathematics
1 answer:
Maksim231197 [3]3 years ago
7 0

Answer:

0 and 2

Step-by-step explanation:

f(x) = -x^2e^{-x}+2xe^{-x}

To find zeros set f(x)=0  and solve for x

0 = -x^2e^{-x}+2xe^{-x}

0 = -e^{-x}(x^2-2x)

now factor out x

0 = -xe^{-x}(x-2)

set each factor =0 and solve for x

x=0

-e^{-x}=0 no solution for x

x-2=0, x=2

zeros of f  are 0 and 2

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Basing your answer on the appearance of the figures below, identify whether the mathematical expression is true or false.
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Answer:

The mathematical expression is false

Step-by-step explanation:

* Lets use the figure to answer the question

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# The side RO appears equal the side PT

∴ RO ≅ PT

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∴ OB ≅ TA

# The side RB appears equal the side PA

∴ RB ≅ PA ⇒ SSS

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# The side DE appears equal the side YX

∴ DE ≅ YX

# The side EF appears equal the side XW

∴ EF ≅ XW

# The side DF appears equal the side YW

∴ DF ≅ YW

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∴ The mathematical expression is false

4 0
3 years ago
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Mrs. Harrison borrows $600 to pay for a new phone. the simple intrest on the loan is 9% for one year
laila [671]

Answer:

$600

Step-by-step explanation:

8 0
3 years ago
At Mr. Hynd's ranch, there are 35 chickens and 20 cows. What is the ratio of the number of cows to the
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5 0
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30 points.. Please Help! I don't understand what to do with this question...a bit confused.
Romashka-Z-Leto [24]
  Eh, here's my best try for a table:

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<u>Like reading:</u>     70                     10                 80
 <u>Don't like read</u>. <u>20</u>                     <u>30</u>               <u>50 </u> 
      <u>total </u>              90                    40               130

The percentage of students that like tv as well as reading is- 70 divided by 130 which gives you .538 which in percentage is 53.8%.

The probability of a student that does not prefer to watch tv as also does not like to spend their time reading is 30 over 40 which can be simplified or reduced to 3 over 4. [30/40 reduced to 3/4]

Hope this somehow helped you :)


5 0
3 years ago
SLOPE AND Y INTERCEPT IM GONNA BREAKDOWN?????????
ollegr [7]

Answer:

slope: -1/2

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