If , then a+b is equal to :
-4
5
-7
1
As denominator will become 0
=> for finite limit numerator must also approach to zero as .
So, L' Hospital Law will be applicable.
1-a+b=0........................(1)
Now,
and
So,
option(3) is correct.
-4
Option 2)5
Option 3)-7
Option 4)1
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