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CBSE Class 11-science Answered

THIS REFERS TO QUESTION -10 REPLIAED BY MS SNEHA, MY REMARKS IS AS - SQUARE IS ALWAYS POSITIVE BUT WHAT ABOUT -9/2, THEN WHY EXPRESSION IS GREATER THAN OR EQUAL TO ZERO, AND ALSO WHAT IS VALE OF b-4a, WHAT ABOUT THE VALUE OF Y WHICH IS GIVEN AS = 2X/(1+X^2)
Asked by mahesh_udr2000 | 31 Aug, 2017, 12:18: PM
answered-by-expert Expert Answer
begin mathsize 16px style straight x to the power of 2 space end exponent is space always space positive space but space in space general space we space say space straight x squared greater or equal than 0
As space square space cannot space be space negative space it space can space be space zero space or space positive.
Here comma space from space the space earlier space steps space straight b space will space tend space towards space infinity space and space
straight a equals fraction numerator negative 9 over denominator 2 end fraction space will space tend space towards space infinity.
So space we space can space not space find space the space value space of space straight b minus 4 straight a.
If space we space put space value space of space straight y space in space terms space of space straight x
we space will space get space complex space numbers.



NOTE colon space
Please space share space the space options space which space has space given. space end style
Answered by Sneha shidid | 01 Sep, 2017, 12:36: PM
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