Question

solve question 7 buddies​

Answer 1

the number in set be{1,4,9}

Thus there are 3 elements in the set

Thus, according to the formula

$2^{number \: of \: elements}$

${2}^{3} = 8$

Hence, the number of proper subsets is 8

Hope it helps.

If you like my answer plz mark as brainliest

Answer 2

Answer:

Number of proper subsets(A) = 7

Explanation:

It is given that,

A = { x:x=n², n = 1,2,3 }

A = { 1,4,9 }

n(A) = 3

Number of subsets = 2^n(A)

= 2³

= 8

Number of proper subsets

= 2^n(A) - 1

= 2³ - 1

= 8 -1

= 7

•••••