Q. If $A = {x : x^{2} = 16}$ and $B = {x : x^{4} = 256}$ , then $A Δ B$ is equal to

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A

${- 4 i, 4 i}$

12%

B

${- 4, 4}$

27%

C

${- 4, 4, 4 i, - 4 i}$

46%

D

${ϕ}$

15%

Solution:

Correct answer is (a) ${- 4 i, 4 i}$