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Of f(x)=p x^2+q x+r is a quadratic expre...

Of `f(x)=p x^2+q x+r` is a quadratic expression such that `[a^2a1b^2b1c^2c1][f(0)f(1)f(-1)]=[2a+1 2b+1 2c+1]` for three unequal numbers `a ,b ,c` then `p=3/2` (b) `q=-1/2` (c) `r=1` (d) `p+q+r=2`

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