Question

If A = {x/x=n-1, neN, n < 3} then find n(A).​

Answer 1

Answer:

n(A)= 2

Step-by-step explanation:

n(1)=1-1=0

n(2)=2-1=1

A={0,1}

Hope this helps you

Answer 2

${\underline{\sf{Given}}}$

• If A = {x/x=n-1, neN, n < 3} then find n(A).

${\underline{\sf{Solution}}}$

Here f(x)=(a-xn)n/1,a>0  and nEN

So, f(f(x))=f((a−xn)1/n)

so, put x→ (a−xn)1/n

f(f(x))=[a−[(a−xn)1/n]n]1/n

             =[a−(a−xn)n/n]1/n

               =(a−a+xn)1/n

            =(xn)1/n

So, f(f(x))=x