**(i) **Given that,

{*x*: *x *∈ R, –4 < *x* ≤ 6}

To write the above expression as intervals The set of real numbers \(\{y : a < y< b\}\) is called an open interval and is denoted by (a,b) . The interval which contains the end points also is called close interval and is denoted by \( [a,b]\)

{*x*: *x *∈ R, –4 < *x* ≤ 6} = (–4, 6]

**(ii)** Given that,

{*x*: *x *∈ R, –12 < *x* < –10} = (–12, –10)

To write the above expression as intervals The set of real numbers \(\{y : a < y< b\}\) is called an open interval and is denoted by (a,b) . The interval which contains the end points also is called close interval and is denoted by \( [a,b]\)

**(iii)** Given that,

{*x*: *x *∈ R, 0 ≤ *x* < 7}

To write the above expression as intervals The set of real numbers \(\{y : a < y< b\}\) is called an open interval and is denoted by (a,b) . The interval which contains the end points also is called close interval and is denoted by \( [a,b]\)

{*x*: *x *∈ R, 0 ≤ *x* < 7} = [0, 7)

**(iv) **Given that,

{*x*: *x *∈ R, 3 ≤ *x* ≤ 4}

{*x*: *x *∈ R, 3 ≤ *x* ≤ 4} = [3, 4]

Find the symmetric difference A Δ B, when A = {1, 2, 3} and B = {3, 4, 5}.