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Grade:

                        

The number of values of the pair (a,b) for which a(x+1)^2 + b{( – x^2) – 3x – 2} + x + 1 = 0 is an identity in x, is 1)0 2)1 3)2 4)Infinite

2 years ago

Answers : (1)

Aditya Gupta
2065 Points
							
the eqn is:
(x+1)[ax+a-b(x+2)+1]=0
or x(a-b)+a-2b+1=0
or a=b and a-2b+1=0
so a=b=1
option 2) is correct
2 years ago
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