InterviewSolution
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InterviewSolution
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Let `A={x:x^(2)-4x+3 lt 0,x in R }` `B={x: 2^(1-x)+p le 0 , x^(2)-2(p+7)x+5 le0}` If `B sube A`, then `p in `A. `[-4,-1]`B. `[-4,oo)`C. `(-oo,1)`D. `[0,1]` |
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Answer» Correct Answer - A `(a)` `A=(1,3)` For `BsubeA{:(2^(1-1)+p le0,p le -1),(2^(1-3)+p le 0, p le -1//4):}}p le -1` `f(x)=x^(2)-2(p+7)x+5` `{:(f(1) le0 implies p ge -4),(f(3) le 0 implies pge-1):}}P ge -4` So `p in[-4,-1]` |
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