RRB Government Jobs Exams

For all x real, (x^2 -4x + 4) =
A. x - 2
B. x + 2x + 2
C. |x - 2|
D. x + 2

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RRB Other Question

If f(x) = ln(x + 1) - 2, then f-1(x) =
A. ex + 1 - 2 B. ex - 2
C. ex + 2 - 2 D. ex + 2 - 1
The value of x that makes x^2 + 6x + 13 maximum is equal to
option
A. 6
B. -3
C. 13
D. 3