The interval of 'a' for which expression x2-ax+1-2a2 is always positive. How do we solve this
The interval of 'a' for which expression x2-ax+1-2a2 is always positive.
How do we solve this
Priya , 6 Years ago
Grade 12
Algebra> The interval of 'a' for which expression ...
2 AnswersSaurabh Koranglekar
Last Activity: 6 Years ago
Arun
Last Activity: 6 Years ago
Dear Priya
Its determinant should be always negative
Hence
a^2 – 4(1 – 2a^2)
9 a^2 – 4
a belongs to (- 2/3 , 2/3)
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