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# DM - Grand Test -Q19

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+1 vote

$\dpi{100} F_1 = \forall a\forall b\exists c (a+b = c)$

$\dpi{100} F_2 = \exists a\forall b\exists c (a+b = c)$

$\dpi{100} F_3 = \forall a\exists b\forall c (a+b = c)$

Where domain of a, b, c are Real numbers. Which of the following is true?

(A) Only $\dpi{100} F_3$

(B) Only $\dpi{100} F_1, F_2$

(C) None

(D) All

reshown Aug 31, 2020

So, Option B is Correct.

answered Sep 7, 2020 by (226,240 points)