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kiran120680
Moderator - Masters Forum
Joined: 18 Feb 2019
Last visit: 27 Jul 2022
Posts: 707
Given Kudos: 276
Location: India
Schools: AGSM '20 EDHEC Sept 2019 Intake Great Lakes '21 IE
GMAT 1: 460 Q42 V13
GPA: 3.6
30 May 2019, 04:04
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
73% (01:10) correct
27%
(01:24)
wrong
based on 368
sessions
History
Date
Time
Result
Not Attempted Yet
If a and b are integers, what is the value of ab?
(1) 5^(a+b) = 125
(2) 3^(a/b) = 1
(1) 5^(a+b) = 125
(2) 3^(a/b) = 1
30 May 2019, 04:13
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Statement 1: \(5^{a+b} = 5^3\). Hence, \(a + b = 3\). We don't know if they are positive or negative integers, so combinations could be various. For instance, 1 + 2 = 3 or -6 + 9 = 3. Not sufficient.
Statement 2: \(3^{\frac{a}{b}} = 3^0\). We can rewrite it as \(\frac{a}{b} = 0\). Thus, \(a = 0\). We derive that \(0 * b = 0\). Sufficient.
Pick B.
Statement 2: \(3^{\frac{a}{b}} = 3^0\). We can rewrite it as \(\frac{a}{b} = 0\). Thus, \(a = 0\). We derive that \(0 * b = 0\). Sufficient.
Pick B.
30 May 2019, 07:53
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lucajava
Statement 1: \(5^{a+b} = 5^3\). Hence, \(a + b = 3\). We don't know if they are positive or negative integers, so combinations could be various. For instance, 1 + 2 = 3 or -6 + 9 = 3. Not sufficient.
Statement 2: \(3^{\frac{a}{b}} = 3^0\). We can rewrite it as \(\frac{a}{b} = 0\). Thus, \(a = 0\). We derive that \(0 * b = 0\). Sufficient.
Pick B.
Hi . can we do 1/3 .. therefore , 3^-1 . -1 = a/b . Statement 2: \(3^{\frac{a}{b}} = 3^0\). We can rewrite it as \(\frac{a}{b} = 0\). Thus, \(a = 0\). We derive that \(0 * b = 0\). Sufficient.
Pick B.
