Question

Tính: A= \(\frac{636363×37-373737×63}{1+2+3+.....+2014}\)

Answer 1

A=\(\frac{63x101x37-37x101x63}{1+2+3+..+2014}\)(vì 636363=63x10101 và 373737=37x101x63)

A\(\frac{0}{1+2+3+4...+2014}\)

A=0

Answer 2

\(A=\frac{636363\times37-373737\times63}{1+2+3+....+2014}\)

\(A=\frac{63\times10101\times37-373737\times63}{1+2+3+......+2014}\)

\(A=\frac{373737\times63-373737\times63}{1+2+3+.....+2014}\)

\(A=\frac{0}{1+2+3+.....+2014}\)

\(A=0\)

HOK TOT