Question

P={x:x=3n+2nEN And x< 15}

Answer 1

Answer:

5,10,15,20,25,30,35,40,45,50,55,60,65,70

Answer 2

if n = 0, x = 3(0) + 2 = 2

if n = 1, x = 3(1) + 2 = 5

if n = 2, x = 3(2) + 2 = 8

 if n = 3, x = 3(3) + 2 = 11

if n = 4, x = 3(4) + 2 = 14

∴ P = {2, 5, 8, 11, 14}

n(P) = 5