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If the line `x+y=a`touches the parabola `y=x-x^2,`then find the value of `adot` |
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Answer» Correct Answer - 2 Eliminating y, we have `a- x= x- x^(2)` or `x^(2) - 2x + a =0`. Since the line touches the parabola, we must have equal roots . Therefore , `4- 4a =0 ` or `a=1` |
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