\(\frac{1}{1.2}+\frac{5}{2.7}+\frac{9}{7.16}+\frac{13}{16.29}\)
\(=1-\frac{1}{2}+\frac{1}{2}-\frac{1}{7}+\frac{1}{7}-\frac{1}{16}+\frac{1}{16}-\frac{1}{29}\)
\(=1-\frac{1}{29}=\frac{28}{29}\)
a) -7/5+8/13+-3/5+5/13 b) 5/4+9/11.11/12 c) 1/2.8/17+1/2.2/17+1/2.7/17
a mũ 2 -(3/5) mũ 2=1/1.2+1/2.7+1/7.5+1/5.13+1/13.8+1/8.19+1/19.11+1/11.25
a^2- (3/5)^2= 1/1.2+1/2.7+1/7.5+1/5.13+1/13.8+1/8.19+1/19.11+1/11.25
a2 - 3/52 = 1/1.2 + 1/2.7 +1/7.5 + 1/5.13 + 1/13.8 + 1/8.19 + 1/19.11 + 1/11.25
a2+ ( 3/5)2= 1/1.2+1/2.7+1/7.5+1/5.13+1/13.8+1/8.19+1/19.11+1/11.25
tìm số nguyên âm a
1.Tìm số nguyên âm a, biết:
a2 = (2\5)2 =1\1.2+1\2.7+1\7.5+1\5.13+1\13.8+1\8.19+1\19.11+1\11.25
Tìm a nguyên âm , biết :
a2 - (3/5)2= 1 / 1.2 + 1/2.7 + 1/7.5 + 1/5.13+ 1/13.8+1/8.19+1/19/11+1/11.25
Thực hiện phép tính:
a) 3/2.7/2+5/3.1/2
b) 1/9.2/145-13/3.2/145+2/145
c) (-91/12):15/7-1/18:15/7+20/9:15/7)
1.2 + 2.3 + 2.4 + 2.5 + 2.6 + 2.7 + 2.8 = ?
