Question

Daca  A= 2 x 10 la puterea n+2 +10 la puterea n +3 x 10 la puterea n-3 -1 care este A

Answer 1

 [tex]A=2\cdot10^{n+2}+10^{n}+3\cdot10^{n-3}-1=\\ =10^n\cdot(2\cdot100+1+3\cdot10^{-3})-1=\\ =10^n(201+\frac{3}{1000})-1=10^n(\frac{201000+3}{1000})-1 =\\ =10^{n-3}\cdot201003\;-\;1 = ...[/tex]