InterviewSolution
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InterviewSolution
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If (a, b) is at unit distance from the line `8x+6y+1=0`, then which of the following conditions are correct ? 1. `3a-4b-4=0` 2. `8a+6b+11=0` 3. `8a+6b-9=0` Select the correct answer using the code given below :A. 1 and 2 onlyB. 2 and 3 onlyC. 1 and 3 onlyD. 1, 2 and 3 |
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Answer» Correct Answer - B Here `(|8a+6b+1|)/sqrt(8^(2)+6^(2))=1 implies |8a+6b+1|=10` `implies 8a+6b+1= pm 10` `implies 8a+6b+1=10` & `8a+6b+1=-10` `implies 8a+6b-9=0` & `8a+6b+11=0` |
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