Q.
The domain of the function fx=lnx-1x2+4x+4 is
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a
-3,-1∪1,2
b
-2,-1∪2,∞
c
-∞,-3∪-2,-1∪2,∞
d
none of these
answer is C.
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Detailed Solution
Case I01 or x>2Then x2+4x+4≥1or x2+4x+3≥0or x≥-1 or x≤-3So, x∈-∞,-3∪2,∞From (1) and 2,x∈-∞,-3∪-2,-1∪2,∞.
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