S = 3/1.4 + 3/4.7 +......+ 3/43.46
S = 1 - 1/4 + 1/4 - 1/7 +.......+ 1/43 - 1/46
S = 1 - 1/46
S = 45/46 < 1
=> S < 1 (đpcm)
Ai k mk mk k lại !!
S = 3/1.4 + 3/4.7 +......+ 3/43.46
S = 1 - 1/4 + 1/4 - 1/7 +.......+ 1/43 - 1/46
S = 1 - 1/46
S = 45/46 < 1
=> S < 1 (đpcm)
Ai k mk mk k lại !!
Cho S=3/1.4+3/4.7+3/7.10+...+3/40.43+3/32+46 .Hay chung to rang S<1
S=3/1.4+3/4.7+3/7.10+...+3/40.43+43.46 CHứng minh S<1
Cho S=3/1.4+3/4.7+3/7.10+...+3/40.43+3/43.46 . Chứng tỏ rằng S<1
cho S= \(\dfrac{3}{1.4}+\dfrac{3}{4.7}+\dfrac{3}{7.10}+...+\dfrac{3}{40.43}+\dfrac{3}{43.46}\)
Hãy chứng tỏ rằng S<1
CHO S : 3/1.4 + 3/4.7 + 3/7.10 ... + 3/40.43 + 3/43.46
HÃY CHỨNG TỎ RẰNG S <1
Cho 3 so nguyen p ; p cong 2014.k;p cong 2015.k la cac so nguyen to lon hon 3 va p chia cho 3 du 1.Chung minh rang k chia het cho 6
S=3/1.4 +3/4.7 +3/7.10 +...+3/40.43 +3/43.46
Cho S= 3/1.4+3/4.7+3/7.10+.......3/40.43+3/43.46.
Hãy chứng tỏ rằng S<1
chung to rang
1/1.2 cong 1/2.3 cong 1/3.4 cong ... cong 1/99.100 be hon 1