1)60^n/2^2n*3^n-1*5^n+1=2^n *2^n *3^n * 5^n /2^2n*3^n-1*5^n+1=2(n+2-2n)*3(n-n+1) * 5 (n-n-1)=3*5-1=3/5
2)45^n+1/3^2n+1*5n=3^n+1*3^n+1*5^n+1/3^2n+1*5n=3(n+1+n+1-2n-1) * 5 (n+1-n)=3*5=15
1)60^n/2^2n*3^n-1*5^n+1=2^n *2^n *3^n * 5^n /2^2n*3^n-1*5^n+1=2(n+2-2n)*3(n-n+1) * 5 (n-n-1)=3*5-1=3/5
2)45^n+1/3^2n+1*5n=3^n+1*3^n+1*5^n+1/3^2n+1*5n=3(n+1+n+1-2n-1) * 5 (n+1-n)=3*5=15