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# If ab ≠ 0, what is the value of 1/a + 1/b ? (1) a + b = -1 (2) ab = 6

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Math Expert
Joined: 02 Sep 2009
Posts: 58454
If ab ≠ 0, what is the value of 1/a + 1/b ? (1) a + b = -1 (2) ab = 6  [#permalink]

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01 Nov 2018, 00:06
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Difficulty:

15% (low)

Question Stats:

85% (00:50) correct 15% (01:17) wrong based on 49 sessions

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If ab ≠ 0, what is the value of 1/a + 1/b ?

(1) a + b = -1

(2) ab = 6(a + b)

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Re: If ab ≠ 0, what is the value of 1/a + 1/b ? (1) a + b = -1 (2) ab = 6  [#permalink]

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01 Nov 2018, 01:37
1
Bunuel wrote:
If ab ≠ 0, what is the value of 1/ + 1/b ?

(1) a + b = -1

(2) ab = 6(a + b)

Question: 1/a + 1/b = (a+b)/ab = ?

Statement 1: a + b = -1
a and b may assume many possible values
NOT SUFFICIENT

Statement 2: ab = 6(a + b)

ie.. (a+b)/ab = 1/6

SUFFICIENT

Bunuel There is a small typo... You missed typing a here what is the value of 1/ + 1/b ?
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Math Expert
Joined: 02 Sep 2009
Posts: 58454
Re: If ab ≠ 0, what is the value of 1/a + 1/b ? (1) a + b = -1 (2) ab = 6  [#permalink]

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01 Nov 2018, 02:08
GMATinsight wrote:
Bunuel wrote:
If ab ≠ 0, what is the value of 1/ + 1/b ?

(1) a + b = -1

(2) ab = 6(a + b)

Question: 1/a + 1/b = (a+b)/ab = ?

Statement 1: a + b = -1
a and b may assume many possible values
NOT SUFFICIENT

Statement 2: ab = 6(a + b)

ie.. (a+b)/ab = 1/6

SUFFICIENT

Bunuel There is a small typo... You missed typing a here what is the value of 1/ + 1/b ?

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Fixed that. Thank you.
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Re: If ab ≠ 0, what is the value of 1/a + 1/b ? (1) a + b = -1 (2) ab = 6   [#permalink] 01 Nov 2018, 02:08
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