Question

2 la puterea x + 2 la puterea( x+1) + 2 la puterea ( x+2) +2 la puterea ( x+3)+ 2la puterea (x+ 4) = 248

Answer 1

2^x + 2^(x+1) + 2^(x+2) + 2^(x+3) 2^(x+4) = 248

2^x + 2^x*2^1 + 2^x*2^2 + 2^x*2^3 + 2^x*2^4 = 2^3*31

2^x * ( 1 + 2 + 4 + 8 + 16 ) =2^3*31

2^ *31 = 2^3*31, deci 2^x = 2^3, rezulta x=3

^ inseamna la puterea, iar * inseamna inmultit cu...