Subject
Bank Exam
Topic
Agrani Bank 2013 Senior Officer
Which of the following describes all values of x for which 1-x2≥0?
Which of the following describes all values of x for which 1-x2≥0?
ক)
x≥1খ)
x≤-1গ)
-1≤x≤1ঘ)
x≤-1 or x≥1Explanation
1-x^2 >= 0 ---> x^2-1<=0 --> (x+1)(x-1)<=0 Above equation true for i) x+1<=0 and x-1>=0 ---> x<= -1 and x>=1 ---> this is not possible ---Strike out this solution ii) x+1>=0 and x-1<=0 ---> x>=-1 and x<=1 --> -1<=x<=1Related questions
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