3/2^2 * 8/3^2 * 15/4^2*......*899/30^2
Tính:
3/2^2 . 8/3^2 . 15/4^2 ..... 899/30^2
Rút gọn
D = 3/2^2 * 8/3^2 * 15/4^2 *........* 899/30^2
Tính A= 3/22.8/32.15/42...899/302.
\(A=\frac{3}{2^2}.\frac{8}{3^2}\frac{15}{4^2}.....\frac{899}{30^2}\)
tính 3/22.8/32.15/42...899/302
3/22 . 8/32 . 15/42 ......899/302
3/22.8/32.15/42.....899/302=?
A= 3/22.8/32. 15/42 ...... 899/302
