Question

tính f(2) biết x+x^2+x^3+...+x^37

help me, thanks

 

Answer 1

A=2+2^2+2^3+...+2^37

A^2=2^2+2^3+...+2^38

A^2-A=2^38-2

A+2^38-2

Answer 2

A=2+2^2+2^3+....+2^37

A^2=2^2+2^3+....+2^38

A^2-A=2^38-2

A+2^38-2

tick nha

Answer 3

A=2+2^2+2^3+....+2^37

A^2=2^2+2^3+....+2^38

A^2-A=2^38-2

A+2^38-2

tick nha