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Updated on: 30 Nov 2023, 09:49
Originally posted by Sajjad1994 on 05 Nov 2020, 06:14.
Last edited by Bunuel on 30 Nov 2023, 09:49, edited 1 time in total.
Last edited by Bunuel on 30 Nov 2023, 09:49, edited 1 time in total.
Edited the question.
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
85% (00:45) correct
15%
(01:01)
wrong
based on 247
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Time
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Which of the following has the greatest value?
(A) −5^6
(B) 6^(−5)
(C) (−6)^5
(D) (−5)^6
(E) 5^(−6)
(A) −5^6
(B) 6^(−5)
(C) (−6)^5
(D) (−5)^6
(E) 5^(−6)
06 Nov 2020, 13:31
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When you see a negative sign, that's really like a multiplication (we're multiplying something by -1). By order of operations, we evaluate exponents before multiplication. So if you see an expression like this:
\(\\
-7^2\\
\)
then that is a negative number; it is equal to -49. If we want to raise -7 to the power 2, we need to enclose "-7" in brackets:
\(\\
(-7)^2 = 49\\
\)
That's the difference here between answers A and D; they have the same absolute value, but A is a negative number while D is a positive one.
\(\\
-7^2\\
\)
then that is a negative number; it is equal to -49. If we want to raise -7 to the power 2, we need to enclose "-7" in brackets:
\(\\
(-7)^2 = 49\\
\)
That's the difference here between answers A and D; they have the same absolute value, but A is a negative number while D is a positive one.
General Discussion
globaldesi
Joined: 28 Jul 2016
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05 Nov 2020, 08:38
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Sajjad1994
whats the difference A and D
is A
\(-(5^6)\)
