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Sir, please explain to me why my answer is wrong. The correct answer is given as option 2. I know the method to get option 2, but I want to know why my method is wrong. Please help me.

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Asked by sumayiah2000 19th November 2019, 1:42 AM
Answered by Expert
Answer:
The step in which you substitute  equation (3) in equation (2) is wrong. 
Answered by Expert 19th November 2019, 10:45 AM
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