Dear Sir / Madam
1. Refer Class-XII Board Paper:
Subject: Maths
Question: 35
Series: HMJ/5
Code No.: 65/5/1,
Set: 1
Date of Examination: 18 March 2020
2. The official solution to this question (shown below for reference) is correct only if conditions are given like "x>0":
3. However, the question does not mention such conditions which makes the official solution incorrect. Plotting equation (ii) in this solution would give the following graph for a=b=c=1.
4. From the graph above, it is clear that the minimum value is "- infinity".
But, according to solution when a=b=c=1, the answer is '2' which contradicts the graph.
5. Therefore, the official solution is incorrect. The correct answer should be "-infinity".
6. In view of the above, the question is incomplete as it does not mention conditions which makes the official solution incorrect.
Therefore, I request you to allot marks for solutions other than official also.
Thanking you
Yours sincerely
Syed Shiraz Zainvi
1. Refer Class-XII Board Paper:
Subject: Maths
Question: 35
Series: HMJ/5
Code No.: 65/5/1,
Set: 1
Date of Examination: 18 March 2020
2. The official solution to this question (shown below for reference) is correct only if conditions are given like "x>0":
3. However, the question does not mention such conditions which makes the official solution incorrect. Plotting equation (ii) in this solution would give the following graph for a=b=c=1.
4. From the graph above, it is clear that the minimum value is "- infinity".
But, according to solution when a=b=c=1, the answer is '2' which contradicts the graph.
5. Therefore, the official solution is incorrect. The correct answer should be "-infinity".
6. In view of the above, the question is incomplete as it does not mention conditions which makes the official solution incorrect.
Therefore, I request you to allot marks for solutions other than official also.
Thanking you
Yours sincerely
Syed Shiraz Zainvi
