Friday, 3 March 2017

Tips and tricks for scoring marks in jee mains

Mathematics


Topic-2 Quadratic equations

One of the  easiest chapter in mathematics and  also important for scoring marks in competitive exams [formula based chapter] .  This chapter includes ,
  • The main concept in this chapter is how to find roots of given quadratic equation both in real and complex equations .
  • relationship between roots , nature of roots etc..
  • Formation of equations using given roots etc...
Questions that appeared in the recent three years main papers from this chapter are as follows :-



Jee mains 2015 paper questions:-







  Hint

For a given quadratic equation ax2 + bx + c = 0 . Let p and q be roots of the equation then the sum of roots[p+q] is -b/a and  product[pxq] of roots is c/a .

  Ans(3) -3



Jee mains 2014 paper questions:-


   Hint

For a given quadratic equation ax2 + bx + c = 0 . Let p and q be roots of the equation then the sum of roots[p+q] is -b/a and  product[pxq] of roots is c/a . The other conditions given are A.P i.e, 1/p + 1/q = 4 and  p + r = 2q . By using these conditions we can find the answer for above problem . 

  Ans(2)