Viết PHP script để hiển thị tổng của dãy số với n cho trước
S = 1+2+3+...+n

The fourth generation of computers emerged between 1970s and 1980s. which technological advancement brought about this generation of computers? which computer architecture was used most in this generation?

In microsoft word, when you highlight existing text you want to replace, you're in              a.  advanced mode.    b.  automatic mode.    c.  basic mode.    d.  typeover mode

The main circuit board inside the system uit is called megaboard / true or false