Question

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Answer 1

try to think about the domain first

which function gives no solution for x values below b?

Answer 2

as a hint, a square root function has no solution when the expression inside the radical is less than 0

so which function has a radical less than 0 when x < b?

Answer 3

A

Answer 4

hint: if x is less than b, then x - b < 0

Answer 5

C

Answer 6

good