Question Number 113931 by Rasheed.Sindhi last updated on 16/Sep/20

∣ x ∣=2⇒ x=2 ∨ x=−2                          OR  ∣ x ∣=2⇒ x=2 ∧ x=−2                    ?

Commented bybemath last updated on 16/Sep/20

or sir. hihihi  x = 2 or −2   because ∣x∣ =  { ((x ; if x≥0)),((−x; if x< 0)) :}

Commented byRasheed.Sindhi last updated on 16/Sep/20

Thanks miss beemath 😃

Answered by MJS_new last updated on 16/Sep/20

x=2∧x=−2 is false because  a=b∧a=c ⇒ b=c  we write x=2∨x=−2 but we should write  x=2 xor x=−2 because ♮∨ε excludes only  ♮none of bothε  a     b     a∧b     a∨b     a xor b  1     1        1             1              0  1     0        0             1              1  0     1        0             1              1  0     0        0             0              0  where 1 means true and 0 means false

Commented byRasheed.Sindhi last updated on 16/Sep/20

T_(HNKS )   S_(IR   ) MJS  for a detailed answer!  Felt difference in the forum  after your being active!

Commented bybemath last updated on 16/Sep/20

super..==