Which conditional and its converse form a true biconditional?

A) If x>0, then lxl >0

B) If x=3, then x2^2=9

C) If x^2 = 4, Then x=2

D) If x=19, then 2x-3=35

Question

Mathematics

Allen Morrow

5 July, 13:02

Which conditional and its converse form a true biconditional?

A) If x>0, then lxl >0

B) If x=3, then x2^2=9

C) If x^2 = 4, Then x=2

D) If x=19, then 2x-3=35

+1

Answers (1)

Know the Answer?

Leandro Watts · Answer 1

The answer is

D) If x=19, then 2x-3=35

proof

If x=19, 2 (19) - 3=38-3=35 so If x=19, then 2x-3=35 is verified

if 2x-3=35, so 2x=35 + 3, 2x=38 implies x = 19, so x = 19 is verified

If x=19 if and only if 2x-3=35

Which conditional and its converse form a true biconditional?A) If x>0, then lxl >0B) If x=3, then x2^2=9C) If x^2 = 4, Then x=2D) If x=19, then 2x-3=35

Which conditional and its converse form a true biconditional?

A) If x>0, then lxl >0

B) If x=3, then x2^2=9

C) If x^2 = 4, Then x=2

D) If x=19, then 2x-3=35