Answer:

A={×/× is even number 2 < × _ < 14}

A = { 4,8,10,12,14 }

B={×/× is prime number 20 < × _ < 32}

B = { 23,29,31 }

C={×/× is multiple of 3, 5 _ < 22}

C = { 6,9,12,15,18,21 }

D=n/n (square) - 1 = 0}.

D = { -1 , 1 }

NB: _ < stands for less than or equal to.

NB: _ < stands for less than or equal to. Please KINDLY help me with ILLUSTRATIONS.

NB: _ < stands for less than or equal to. Please kindly help me with illustrations. If A={all odd numbers less than 20}

A = { 1,3,5,7,9,11,13,15,17,19 }

B={all prime numbers less than 20}

B = { 2,3,5,7,11,13,17,19 }

C={all multipleof 3 less than 20}

C = { 3,6,9,12,15,18 }

FIND A intersect B, A intersect B intersect C, B U C, A U B U C.

AnB = { 1,3,5,7,9,11,13,15,17,19}n{2,3,5,7,11,13,17,19}

= { 3,5,7,11,13,17,19 }

AnBnC = ({ 1,2,3,5,7,9,11,13,15,17,19}n{2,3,7,11,13,17,19})n{3,5,7,11,13,17,19}

= { 2,3,7,11,13,17,19}n{3,5,7,11,13,17,19}

= { 3,7,11,13,17,19}

BUC = { 2,3,5,7,11,13,17,19}U{3,6,9,12,15,18}

= { 2,3,5,6,7,9,11,12,13,15,17,18,19}

AUBUC = {1,3,5,7,9,11,13,15,17,19}U{2,3,5,7,11,13,17,19}U{3,6,9,12,15,18}

= { 1,2,3,5,7,9,11,13,15,17,18,19}

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