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chứng minh rằng 1/5+1/14+1/28+1/44+1/61+1/85+1/91<1/2
Chứng minh rằng : 1/5 + 1/14 + 1/28 + 1/44 + 1/61 + 1/85 + 1/91 < 1/2
B=1/5+1/14+1/28+1/44+1/61+1/85 Chứng minh rằng B<1/2
chứng minh: 1/5 + 1/14+1/28 +1/44 + 1/61+1/85+1/97 <1/2
chung minh 1/5+1/14+1/28+1/44+1/61+1/85+1/97 < 1/2
Chứng minh rằng:
\(\frac{1}{5}+\frac{1}{14}+\frac{1}{28}+\frac{1}{44}+\frac{1}{61}+\frac{1}{85}+\frac{1}{91}<\frac{1}{2}\)
ứng tỏ rằng 1/5 +1/14 + 1/28 + 1/44 +1/61 + 1 / 85 + 1 / 91 < 1/2
chứng minh
1/5+1/14+1/28+1/44+1/61+1/85+1/97<1/2
chung minh rang
1/5+1/14+1/28+1/44+1/61+1/85+1/97<1/2