Question

which of the following is a null set

(1)
(x:x is root of 3x - 6 = 0
(2)
{x: x is a root of x-9=0)
(3)
{x:x is a root of x +9=0
(4)
None of these​

Answer 1

Answer:

(3)

PLEASE MAKE IT BRAINLEST

Answer 2

Answer:

3 is the correct answer

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