Question

A={x/x=1/y^2+1;y belongs to N,y<4}write in roster form

Answer 1

Step-by-step explanation:

here the formula is important also which the range given, y belongs to natural number and y is less than 4

x = 1/y^2 + 1

for y = 1

x = 1/1^2 +1 = 1/1+1 = 1/2

for y = 2

x = 1/2^2 + 1 = 1/4+1 = 1/5

for y = 3

x = 1/3^2 + 1 = 1/9+1 = 1/10

A = { 1/2, 1/5, 1/10}

(please note, in this set x is the member, you will not write the value of y in the members of the set, y is helping to find the members of the set by the formula given)

I hope it helps