Question

Which of the following steps in this proof contains a flaw?

Answer 1

A. Step 2 (subtracted wrong expression)
B. Step 4 (not a difference of squares)
C. Step 5 (wrong factors)
D. Step 3 (factored incorrectly)

Answer 2

@bibby

Answer 3

@whpalmer4

Answer 4

What does \(a^3=\)
Does that appear in \(a^4-a^5\)?

Answer 5

I figured this one out, its D. Thanks :)
One more question, I think I know it! I'm in a hurry tho :(

Answer 6

D is correct, good job!

Answer 7

Which of the following steps in this proof contains a flaw?

Answer 8

I cant seem to get the attachment O.O

Answer 9

Type quickly :-)

Answer 10

Can you do a screen capture?

Answer 11

Its pretty long O.O

Answer 12

I'll try!

Answer 13

I'll be back if you post something...

Answer 14

ok, thanks

Answer 15

@whpalmer4

Answer 16

I think its C?

Answer 17

No, \[a^4(1-a^2)=a^4*1-a^4*a^2=a^4-a^6\]

Answer 18

What is the rule for doing exponents in division?

Answer 19

I'm confused

Answer 20

\[\frac{x^m}{x^n}=\]

Answer 21

umm, \[x^m\]?

Answer 22

\[\frac{x^m}{x^n}=x^{m-n}\]

Answer 23

Oh...

Answer 24

That's a big hint :-)

Answer 25

Oh, the bottom one it n, I didn't see it O.O

Answer 26

So, how do I solve the question?

Answer 27

Look carefully at the work in step 2.

Answer 28

4+6-5=

Answer 29

Still confusing...

Answer 30

5

Answer 31

Is it A O.O

Answer 32

How do you handle exponents when multiplying two exponential s with the same base? You add them right? So we add 4+6=10. Then for division, we subtract, so 10-5=5. But the idiot doing the proof thought it gave him \(a^6\) :-)

Answer 33

You mean its step 2? but its not in the choices O.O

Answer 34

Yes it is, it's choice A, the mistake is made in step 3 evaluating what the result of step 2 is...

Answer 35

@whpalmer4 I dont get this D:
And I need to go in a bit...

Answer 36

oh, ok. thanks!

Answer 37

Multiplying both sides by a^6 in step 2 is fine. It's in step 3 deciding that the left side is a^6 that is wrong.

Answer 38

check last one?

Answer 39

Sure, if you want...do you want? :-)

Answer 40

I think its B, but not sure

Answer 41

Correct?

Answer 42

@whpalmer4 I hate to rush you.. but I'm really in a hurry!

Answer 43

Yep.

Answer 44

ok, thanks! :-)

Answer 45

You're welcome!

Answer 46

Thanks soo much!
I gtg now, good night!