If M+4 =2, what is the value of M?
(1) M<0 (2) M^2+8M+12=0
I answered D...
OA is [spoiler]E[/spoiler]
Set 25 Q: 34 - Mod
This topic has expert replies
-
- Legendary Member
- Posts: 683
- Joined: Tue Jul 22, 2008 1:58 pm
- Location: Dubai
- Thanked: 73 times
- Followed by:2 members
I agree the answer should be D
The ques says m+4=2
m=2 or m=-2 depending on whether m is positive or negative.
St 1 says m<0 So m=-2---SUFF
St 2 says m2+8m+12=0
m=-6, m=-2
m=-2---SUFF
Answer is D
Unless I'm missing something???
The ques says m+4=2
m=2 or m=-2 depending on whether m is positive or negative.
St 1 says m<0 So m=-2---SUFF
St 2 says m2+8m+12=0
m=-6, m=-2
m=-2---SUFF
Answer is D
Unless I'm missing something???
-
- Senior | Next Rank: 100 Posts
- Posts: 37
- Joined: Wed Sep 17, 2008 8:17 pm
- Location: India
- Thanked: 4 times
I could not understand the question clearly.
if M+4=2 then isn't it clear that M=-2. So, why do we need any other statement when answer is deducible from question itself.
Is the question typed correctly?
if M+4=2 then isn't it clear that M=-2. So, why do we need any other statement when answer is deducible from question itself.
Is the question typed correctly?
-
- Legendary Member
- Posts: 683
- Joined: Tue Jul 22, 2008 1:58 pm
- Location: Dubai
- Thanked: 73 times
- Followed by:2 members
Ok i just checked and the question posted is incorrect
The original question had a mod in the ques and the orginal equation read mod(m+4)=2
So in this case the answer is E
So the equation could either be -(m+4)=2; -m-4=2; m=-6
(m+4)=2, m=-2
St 1: M<0
Still unclear if m=-6 or -2
St 2
m^2+8m+12=0
again we have two values for m=-6 or -2
Combining 1 & 2 we still dont get a clear soln for m
Hence the answer is E
The original question had a mod in the ques and the orginal equation read mod(m+4)=2
So in this case the answer is E
So the equation could either be -(m+4)=2; -m-4=2; m=-6
(m+4)=2, m=-2
St 1: M<0
Still unclear if m=-6 or -2
St 2
m^2+8m+12=0
again we have two values for m=-6 or -2
Combining 1 & 2 we still dont get a clear soln for m
Hence the answer is E