- Rajasuman Peddi
- Nov 02, 2016

**Q.** If f(x) =

**Option:**

**a**. 3

**b**. 2

**c**. 1

**d**. 0

**Solution:**

Given f ( 0 ) = 1, let's put the value x = 1 in the equation

a(0)(0) + b(0) + c = 1

c = 1 ................................. Equation 1

Given f ( -1 ) = 3, put the value x = -1 in the equation

a(-1)(-1) + b(-1) + c = 3

a - b + c = 3 ................................. Equation 2

Substituting the value of c in equation 1

a - b = 2

**Hence, choice B is correct.**

Try to solve this question on your own! Do post your comments and solutions in the comment section below

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