so sánh A và B:
A=\(\frac{10^7+5}{10^7-8}\) ; B=\(\frac{10^8+6}{10^8-7}\)
huhu ai giup mik voi
So sánh A và B:
a)A=\(\frac{10^7+5}{10^7-8}\); B=\(\frac{10^8+6}{10^8-7}\)
\(A=\frac{10^7+5}{10^7-8}=\frac{\left(10^7-8\right)+13}{10^7-8}=1+\frac{13}{10^7-8}\)
\(B=\frac{10^8+6}{10^8-7}=\frac{\left(10^8-7\right)+13}{10^8-7}=1+\frac{13}{10^8-7}\)
Vì \(10^7-8< 10^8-7\) nên \(\frac{13}{10^7-8}>\frac{13}{10^8-7}\)
\(\Rightarrow1+\frac{13}{10^7-8}>1+\frac{13}{10^8-7}\) do đó \(A>B\)
1. So Sánh: \(A=\frac{10^7+5}{10^7-8};B=\frac{10^8+6}{10^8-7}\)
dễ thôi
A=\(\frac{10^7+5}{10^7-8}=\frac{10^7-8+13}{10^7-8}=1+\frac{13}{10^7-8}\)
B=\(\frac{10^8+6}{10^8-7}=\frac{10^8-7+13}{10^8-7}=1+\frac{13}{10^8-7}\)
\(10^8>10^7nen10^8-7>10^7-8\)
=> \(\frac{13}{10^8-7}< \frac{13}{10^7-8}hayB< A\)
\(\frac{10^7+5}{10^7-8}=\frac{10^7-8+13}{10^7-8}=1-\frac{13}{10^7-8}\);\(\frac{10^8+6}{10^8-7}=\frac{10^8-7+13}{10^8-7}=1-\frac{13}{10^7-7}\)
Vì \(\frac{13}{10^8-8}< \frac{13}{10^7-7}\)nên A>B
Ta có :
\(A=\frac{10^7+5}{10^7-8}=\frac{10^7-8+13}{10^7-8}=1+\frac{13}{10^7-8}\)
\(B=\frac{10^8+6}{10^8-7}=\frac{10^8-7+13}{10^8-7}=1+\frac{13}{10^8-7}\)
Mà \(\frac{13}{10^7-8}>\frac{13}{10^8-7}\left(10^7-8< 10^8-7\right)\)
\(\Rightarrow1+\frac{13}{10^7-8}>1+\frac{13}{10^8-7}\)
\(\Rightarrow A< B\)
Vậy \(A< B\)
~ Ủng hộ nhé
Sso sánh A và B:
A= \(\frac{10^7+5}{10^7-8}\)
B = \(\frac{10^8+6}{10^8-7}\)
Nhanh nha,10 giờ 30 phải nộp mik rồi
\(A=\frac{10^7+5}{10^7-8}=\frac{10^7-8+13}{10^7-8}=1+\frac{13}{10^7-8}\)
\(B=\frac{10^8+6}{10^8-7}=\frac{10^8-7+13}{10^8-7}=1+\frac{13}{10^8-7}\)
\(\frac{13}{10^7-7}>\frac{13}{10^8-7}\Rightarrow\frac{10^7+5}{10^7-8}>\frac{10^8+6}{10^8-7}\)
linh ới mi còn kém lắm tui lm đc rùi nha mà ko cần nhìn cái j nha ^.^ hề hề
So sánh A và B biết:
a) \(A=\frac{3}{83}+\frac{7}{84};B=\frac{7}{83}+\frac{3}{84}\)
b) \(A=\frac{10^7+5}{10^7-8};B=\frac{10^8+6}{10^8-7}\)
So sánh:
M=\(\frac{10^7+5}{10^7-8}\) và N=\(\frac{10^8+6}{10^8-7}\)
\(M=\frac{10^7+5}{10^7-8}=\frac{10^7-8+13}{10^7-8}=1+\frac{13}{10^7-8}\)
\(N=\frac{10^8+6}{10^8-7}=\frac{10^8-7+13}{10^8-7}=1+\frac{13}{10^8-7}\)
Ta có \(10^8-7>10^7-8\) \(=>\frac{13}{10^8-7}< \frac{13}{10^7-8}\) \(=>M< N\)
Vậy M<N
n<m nha ban
chuc ban hoc gioi
tk cho minh nha
so sánh A và B
\(A=\frac{10^7+5}{10^7-8}\) và \(B=\frac{10^5+6}{10^5-7}\)
a=(10^7 -8 +13)/(10^7 - 8) = 1+ 13/(10^7 - 8)
b = (10^5 +6)/(10^5 -7) = (10^5-7+13)/(10^5 -7) = 1 + 13/(10^5-7)
vay b>a
So sánh A=\(\frac{10^7+8}{10^7-8}\)B=\(\frac{10^8+8}{10^7-8}\)
10^7+8/10^7-8<10^8+8/10^7-8
cho mik nhé
thnks !!!!!!!!!!!!!
so sánh A = 10^7-5/10^7-8 và B = 10^8+6/10^8-7
So sánh A và B biết:
a) A =\(\frac{10^7+5}{10^7-8}\) B =\(\frac{10^8+6}{10^8-7}\)
B) A =\(\frac{15^{16}-13}{15^{16}+7}\) B = \(\frac{16^{17}-12}{16^{17}+8}\)