a,
\(\frac{1}{51}+\frac{1}{52}+...+\frac{1}{100}
a,
\(\frac{1}{51}+\frac{1}{52}+...+\frac{1}{100}
chứng minh
a) 1/2 < 1/51 + 1/52 +....+ 1/100 < 1
b) 7/12 < 1/21 + 1/22 + ...+ 1/40 < 5/6
chung minh rang
1/2<1/51+1/52+1/53+.....1/100<1
7/12<1/21+1/22+....1/40<5/6
giúp mình với
chứng minh rằng
1/2<1/51+1/52+1/53+.....+1/100
7/12<1/21+1/22+.....+1/40<5/6
Chứng minh
A)H=1/2<1/51+1/52+1/53+...+1/100<1
B)7/12<1/21+1/22+1/23+...+1/40<5/6
C)1<S<2 biết: S=6/15+6/16+6/17+...+6/19
cmr
a, 1/2<1/51+1/52+....+1/100<1
b 7/12<1/21+1/22+....+1/40<1/10
1.Tìm số nguyên x biết:
a.-x/2+2x/3+x+1/4+2x+1/6=3/8
b.3/2x+1+10/4x+2+6/6x+3=12/26
2.Chứng minh:
a.1/2<1/51+1/52+...+1/100<1
b.7/12<1/21+1/22+...+1/40<5/6
Các bạn giúp mk ghi rõ lời giải nha!!
Ai trả lời đc mk tick cho!
Chứng minh
a)\(\frac{1}{2}\)<\(\frac{1}{51}\)+\(\frac{1}{52}\)+...+\(\frac{1}{100}\)<1
b)\(\frac{7}{12}\)<\(\frac{1}{21}\)+\(\frac{1}{22}\)+...+\(\frac{1}{40}\)<\(\frac{5}{6}\)
Giúp mk với
cho S = 1/51+1/52+...+1/100. CMR 7/12<S<5/6
CMR:\(\dfrac{7}{12}< \dfrac{1}{51}+\dfrac{1}{52}+...+\dfrac{1}{100}< \dfrac{5}{6}\)
giúp mk nhé