Question

if A={x/x-2=-1,X€R} then n(p(A))​

Answer 1

† Given ,

★ A={x : x-2=-1,X€R}

So, A = { 1 }

Now, number of elements in set A, (n) → 1

So,

n[P(A)]

= ${\bold{{2}^{n}}}$

= 2¹

= 2