If ax+b=0 is x>0?
1) a+b>0
2) a-b > 0
OA E
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If ax+b=0 is x>0?
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neelgandham
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If ax+b=0 Is x>0?
From the question, x = -b/a. So the question can be rephrased to
Is -b/a>0?
Let the value of a be 7 and the value of b be 3. Then the value of a+b = 10>0 and the value of -b/a = -3/7 < 0.
Since there are two different answers to the question, statement 1 is insufficient to answer the question.
Let the value of a be 7 and the value of b be 3. Then the value of a-b = 4>0 and the value of -b/a = -3/7 < 0.
Since there are two different answers to the question, statement 2 is insufficient to answer the question.
Let the value of a be 7 and the value of b be 3. Then the value of a-b = 4>0, the value of a+b=10>0 and and the value of -b/a = -3/7 < 0.
Since there are two different answers for the question, statement 1+2 combined is insufficient to answer the question.
Hence the correct answer choice is E
From the question, x = -b/a. So the question can be rephrased to
Is -b/a>0?
Let the value of a be 7 and the value of b be -3. Then the value of a+b = 4>0 and the value of -b/a = 3/7 > 0.1) a+b>0
Let the value of a be 7 and the value of b be 3. Then the value of a+b = 10>0 and the value of -b/a = -3/7 < 0.
Since there are two different answers to the question, statement 1 is insufficient to answer the question.
Let the value of a be 7 and the value of b be -3. Then the value of a-b = 10>0 and the value of -b/a = 3/7 > 0.2) a-b > 0
Let the value of a be 7 and the value of b be 3. Then the value of a-b = 4>0 and the value of -b/a = -3/7 < 0.
Since there are two different answers to the question, statement 2 is insufficient to answer the question.
Let the value of a be 7 and the value of b be -3. Then the value of a-b = 10>0, the value of a+b=4>0 and the value of -b/a = 3/7 > 0.Statement 1 + 2
Let the value of a be 7 and the value of b be 3. Then the value of a-b = 4>0, the value of a+b=10>0 and and the value of -b/a = -3/7 < 0.
Since there are two different answers for the question, statement 1+2 combined is insufficient to answer the question.
Hence the correct answer choice is E
Anil Gandham
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krishna239455
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Alternate way:
Statement 1: a+b>0, which means a-ax>0, which means a(1-x)>0, which means (1-x)>0 and (1-x)<0 both are possible, since we dont know about "a" INSUFFECIENT
Statement 2: a-b>0, whcih means a+ax>0, which means a(1+x)>0, which means (1+x)>0 and (1+x)<0 both are possible. since we dont know about "a"INSUFFECIENT
Combined: (a-ax+a+ax)>0, which means a>0, still we get -1<x<1. Hence not suffecient
Statement 1: a+b>0, which means a-ax>0, which means a(1-x)>0, which means (1-x)>0 and (1-x)<0 both are possible, since we dont know about "a" INSUFFECIENT
Statement 2: a-b>0, whcih means a+ax>0, which means a(1+x)>0, which means (1+x)>0 and (1+x)<0 both are possible. since we dont know about "a"INSUFFECIENT
Combined: (a-ax+a+ax)>0, which means a>0, still we get -1<x<1. Hence not suffecient
