so sanh A va B
A = 100^101 + 1 / 100^100 + 1
B = 100^100 + 1 / 100^99 + 1
A=2020^100-1:2020^99+1 so sanh a va b
B=2020^101-1:2020^100+1
cho A=1/2.3/4.5/6........99/100 va B=2/3.4/5.5/6.........100/101 so sanh A va B
SO SANH
\(M=\frac{100^{100}+1}{100^{99}+1}\)
\(VA\)
\(N=\frac{100^{101}+1}{100^{100}+1}\)
Ta có : N = \(\frac{100^{101}+1}{100^{100}+1}\)< \(\frac{100^{101}+1+99}{100^{100}+1+99}\)= \(\frac{100^{101}+100}{100^{100}+100}\)= \(\frac{100\left(100^{100}+1\right)}{100\left(100^{99}+1\right)}\)= \(\frac{100^{100}+1}{100^{99}+1}\)= M
Vậy M > N.
NHỚ K VỚI NHÉ!!!!!!
Câu hỏi của chu nguyen anh thu - Toán lớp 6 - Học toán với OnlineMath
tham khảo cách này nhé, t cũng làm như vậy
So sanh
A=100100+1/10090+1 va B=10099+1/10089+1
Ai giai nhanh va dung,mik tick cho
Mik cũng gặp bài giống y như bạn nhưng ko giải đc đây. Bạn nào biết vào giúp chúng mình đi.
A=\(\frac{100^{100}+1}{100^{99}+1}< \frac{\left(100^{100}+1\right)+99}{\left(100^{90}+1\right)+99}=\frac{100^{100}+100}{100^{90}+100}=\frac{100\left(100^{99}+1\right)}{100\left(100^{89}+1\right)}=\frac{100^{99}+1}{100^{89}+1}\)
Vì \(\frac{100^{99}+1}{100^{89}+1}=\frac{100^{99}+1}{100^{89}+1}\)
Nên A=B
So sanh :
A=100100+1/10099+1 va B=10069+1/10068+1
Ai lam dung mik se tick
Dễ thấy A < 1. Áp dụng nếu \(\frac{a}{b}<1\) thì \(\frac{a}{b}<\frac{a+m}{b+m}\) ta có :
\(A=\frac{100^{100}+1}{100^{99}+1}<\frac{\left(100^{100}+1\right)+\left(100^{31}-1\right)}{\left(100^{99}+1\right)+\left(100^{31}-1\right)}=\frac{100^{100}+100^{31}}{100^{99}+100^{31}}=\frac{100^{31}.\left(100^{69}+1\right)}{100^{31}.\left(100^{68}+1\right)}=\frac{100^{69}+1}{100^{68}+1}=B\)
Vậy A < B
\(\frac{100^{100}+1}{100^{99}+1}=\frac{100^{69}+1}{100^{68}+1}\)
so sanh Ava B biet A=(100^99+99^99)^100 va B=(100^100+99^100)^99
Cho M=1/2.3/4.5/6...99.100 va N=2/3.4/5.6/7.... 100/101 va N=2/3.4/5.6/7..100/101
a) So sanh M va N b) Tinh M.N c) So sanh M va 1/10
so sanh
A=100^100+1 /100^99+1 ; D=100^99+1/100^89+1
So sánh bt: \(M=\dfrac{100^{100}+1}{100^{99}+1};N=\dfrac{100^{101}+1}{100^{100}+1}\)
Ta có:
\(M=\dfrac{100^{100}+1}{100^{99}+1}\)
\(\Rightarrow\dfrac{M}{100}=\dfrac{100^{100}+1}{100\cdot\left(100^{99}+1\right)}\)
\(\Rightarrow\dfrac{M}{100}=\dfrac{100^{100}+1}{100^{100}+100}\)
\(\Rightarrow\dfrac{M}{100}=1-\dfrac{99}{100^{100}+100}\)
\(N=\dfrac{100^{101}+1}{100^{100}+1}\)
\(\Rightarrow\dfrac{N}{100}=\dfrac{100^{101}+1}{100\cdot\left(100^{100}+1\right)}\)
\(\Rightarrow\dfrac{N}{100}=\dfrac{100^{101}+1}{100^{101}+100}\)
\(\Rightarrow\dfrac{N}{100}=1-\dfrac{99}{100^{101}+100}\)
Mà: \(100^{101}>100^{100}\)
\(\Rightarrow100^{101}+100>100^{100}+100\)
\(\Rightarrow\dfrac{99}{100^{101}+100}< \dfrac{99}{100^{100}+100}\)
\(\Rightarrow1-\dfrac{99}{101^{101}+100}< 1-\dfrac{99}{100^{100}+100}\)
\(\Rightarrow\dfrac{N}{100}< \dfrac{M}{100}\)
\(\Rightarrow N< M\)