Question

y={5,55,555,5555}.write set builder form.​

Answer 1

Answer:

y = {x : x = 5/9[ (10^(n+1) - 10)/9 - n] , n€N , 1<=n<=5}

Step-by-step explanation:

y = {x : x = 5/9[ (10^(n+1) - 10)/9 - n] , n€N , 1<=n<=5}

ex:

n = 1

x = 5/9 [ (10^(1+1) - 10)/9 - 1]

x = 5/9 [ (10^2 - 10)/9 - 1]

x = 5/9 [ (100 - 10)/9 - 1]

x = 5/9 [ 90/9 - 1]

x = 5/9 [10 - 1]

x = 5/9 × 9

x = 5