Please solve the question

Q. If at each point on the curve y = x 1 – ax 2 + x +1 the tangent is inclined at an acute angle with positive direction of x axis , then 

     (a) a > 0                    (b) a  3                 (c) |a|  3                 (d) none of these 
   
 

Dear Student,

Please refer the following link for answer to similar query

https://www.meritnation.com/ask-answer/question/if-at-each-point-of-the-curve-y-x-3-ax-2-x-1-the-tangent/tangents-and-normals/9766095

As per the solution option C is the correct answer.

Regards,

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