Tính nhanh:
a) 54.4034-2014.( 20153+20152+2016)
b) 10013 - 9993- 6.10002
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) ( 100 – 1 ) 3 = 970299. b) ( 91 + 9 ) 3 = 100 3 .
c) ( 1000 + 1 ) 3 = 1003003001. d) ( 102 – 2 ) 3 = 100 3 .
\(201^2=\left(200+1\right)^2=200^2+2.200.1+1^2=40000+400+1=40401\)
\(498^2=\left(500-2\right)^2=500^2-2.500.2+2^2=250000-2000+4=248004\)
\(2014^2+\left(2014+2\right)\left(2014-2\right)=2014^2+2014^2-4=2\times2014^2-4\)
2014 x2014+2016 x 2012
=2014+2016 x 2012
=(2014+2016) x 2012
=2012 x 4036
????????
ah hihihi do ngoc
\(10A=\dfrac{10^{2015}+2016+9\cdot2016}{10^{2015}+2016}=1+\dfrac{18144}{10^{2015}+2016}\)
\(10B=\dfrac{10^{2016}+9+18144}{10^{2016}+2016}=1+\dfrac{18144}{10^{2016}+2016}\)
mà \(\dfrac{18144}{10^{2015}+2016}>\dfrac{18144}{10^{2016}+2016}\)
nên A>B
bằng 1 thưa bạn
=(2014*2013 +2014+2014-2016) : (2012 +2013*2014)
=(2014*2013 +2012):(2012+2013*2014)
\(\frac{2014\cdot2015+2014}{2014\cdot2016-1000}\)
\(=\frac{2014\cdot2015+2014}{2014\cdot\left(2015+1\right)-1000}\)
\(=\frac{2014\cdot2015+2014}{2014\cdot2015+2014\cdot1-1000}\)
\(=\frac{2014\cdot2015+2014}{2014\cdot2015+1014}\)
\(=\frac{2014}{1014}=.......\)