Question

Write in roster form: A = { 4x : 7 <= x <= 15, x ∈ R }

Answer 1

Answer:

A = {28, 32, 36, 40, 44, 48, 52, 56, 60}

Explanation:

A = { 4x : 7 <= x <= 15, x ∈ R }

According to question,

Firstly we find value of x

So, x is 7, 8, 9, 10, 11, 12, 13, 14 ,15

because it is given x is Greater or equal to 7 and smaller and equal to 15.

For finding elements we have to multiply x with 4 we will get,

28, 32, 36, 40, 44, 48, 52, 56, 60

because 4x is given so answer is given in answer box.

Solved by,

Aaditya Singh