A sube phi rArr A=phi

Prove that A sub phi rArr A=phi

For any set A, prove that A sube phi hArr A =phi .

Prove that : (i) A sube B,B sube C rArrA sube C (ii) A sube phi, hArr A = phi

Prove that : (i) A sube B,B sube C rArrA sube C (ii) A sube phi, hArr A = phi

Examine whether the following statement is true or false: phi sube phi( i ) phi sube phi (ii)0in phi (iii) phi={0} (v) {{1},{2},3}={1,{2},3} (vi) {a}in{a,{a},{{a}}}={1,{2},3}

For any two sets A and B, prove that: A nn B=phi rArr A sube B'

In a binary operation **: phi xx phi rarr phi is defined as a ** b = (ab)/4, a , b in phi . Show that ** is associative.

IF A= {6,9,11},phi={} , find A cup phi, A cap phi .

Consider the following statements I. phi in {phi} II. {phi} sube phi Which of the statements given above is/are Correct?

Represents sets A,B,C such the A sube B , A nn C = phi and B nn C != phi by venn diagram and shade the portion representing A uu (B nn C )