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What is the value of (ab)^(b−a)?

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What is the value of (ab)^(b−a)?  [#permalink]

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New post 14 Jan 2020, 23:15
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A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

82% (00:55) correct 18% (01:11) wrong based on 39 sessions

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What is the value of (ab)^(b−a)?

1) b − a = 8

2) 5a = −19 + 2b

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Re: What is the value of (ab)^(b−a)?  [#permalink]

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New post 21 Jan 2020, 05:51
1
Given

b-a = 8 , as we don't have any unique values , insufficient
5a-2b= -19, as a and b can be fractions too, there can many possible solutions, insufficient

by using both statements , we get unique values for a and b

so option c is correct.
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Re: What is the value of (ab)^(b−a)?   [#permalink] 21 Jan 2020, 05:51
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What is the value of (ab)^(b−a)?

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