zad 1. liczby  pi =0,8(3) i y = 1(3) zapisz jako zwykle i oblicz :   a) [latex]frac{1}{pi} + frac{1}{y}[/latex]   b) [latex]frac{1}{pi^2} + frac{1}{y^2}[/latex]   c) [latex]frac{1}{pi} + y[/latex]    

pi=0,8(3)=5/6 y=1,(3)=1 1/3=4/3 a)1 /(5/6)  + 1 /(4/3)= 6/5+3/4=24/20+15/20=39/20=1 19/10 b)1   /(5/6)^2  +1  /(4/3)^2  =1 / (25/36)  +1 /(16/9)=  36/25+9/16=1 11/25+9/16= 1 176/400 +225/400= 1 401/400=2 1/400 c) 1 /(5/6)  +4/3 =6/5+4/3= 18/15 +20/15=38/15=2 8/15