chung minh1/2^2+1/4^2+1/6^2+...........+1/2016^2<1/2
Chung minh1/3²+1/4²+1/5²+……1/100²<1/2
Chứng Minh Rằng :A=\(\dfrac{1}{2^2}\)+\(\dfrac{1}{4^2}\)+\(\dfrac{1}{6^2}\)+...+\(\dfrac{1}{1002^2}\)<\(\dfrac{1}{2}\)
Bài 7 a) Chứng minh rằng
1 - 1/2 + 1/3 - 1/4 + 1/5 - 1/6 +......+ 1/1999 - 1/2000 = 1/1001 +1/1002+1/1003 +.....+ 1/2000
Bài 7 a) Chứng minh rằng
1 - 1/2 + 1/3 - 1/4 + 1/5 - 1/6 +......+ 1/1999 - 1/2000 = 1/1001 +1/1002+1/1003 +.....+ 1/2000
Chung minh1/3^2+1/4^2+1/5^2+..........+1/100^2<1/2
Lam on giai ki giup minh. Minh can trong 30 phut nua
Tính:
1/1×2×3+1/2×3×4+1/3×4×5+....................+1/1001×1002×1003
Tính giá trị các biểu thức sau
a, 1+2+3+....+2016
b, 1*2+2*3+3*4+...+1001*1002
c, 1*3+2*4+3*5+...+2013*2015
d, 6+16+30+48+...+19600+19998
e, 22+42+62+...+982+1002
Chứng minh 1-1/2+1/3-1/4+...+1/2002-1/2003 = 1/1002+1/1003+...+1/2003
