Question

Ajutooor, dau coroana si puncte!!Plsss! E urgent!!

Answer 1

   1+[1/2 + (1/2)^2 + (1/2)^3 + (1/2)^4] : (1/2)^5 =
= 1 + (1/2 + 1/4 + 1/8 + 1/16) : (1/32) =
= 1 + (8/16+4/16+2/16+1/16) x 32/1 = 
= 1 + 15/16 x 32 = 
= 1 + 15/1x2 = 
= 1 + 30 = 
= 31

   [(1/2+1/3)^2 - (1/3)^2] : (2/3)^2 = 
= [(3/6+2/6)^2 - 1/9] : 4/9 = 
= [(5/6)^2 - 1/9] x 9/4 = 
= (25/36 - 1/9) x 9/4 = 
= (25/36 - 4/36) x 9/4 = 
= 21/36 x 9/4 =
= 21/4 x 1/4 = 
= 21/16