Let p x be a quadratic polynomial such that p 0 = 1 . If p x leaves remainder 4 when divided by x - 1 and it…

Let px be a quadratic polynomial such that p0=1. If px leaves remainder 4 when divided by x-1 and it leaves remainder 6 when divided by x+1 then:
  1. p-2=19
  2. p2=19
  3. p-2=11
  4. p2=11

Solution

 Assume , px=ax2+bx+c

Given , p0=1c=1

Now,p1=4p-1=6

a+b+c =4a-b+ c=6a+b+1 =4a-b+1=6 a+b =3a-b=5    a=4      b=-1

px=4x2-x+1

p-2=16+2+1=19

Asked in: JEE Main 2017 (08 Apr Online)

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