\(=\dfrac{2017^2-1-1}{2017+1+2017\left(2017-1\right)}\)
\(=\dfrac{2017^2-2}{2017^2+2017+1-2017}=\dfrac{2017^2-2}{2017^2+1}\)
\(=\dfrac{2017^2-1-1}{2017+1+2017\left(2017-1\right)}\)
\(=\dfrac{2017^2-2}{2017^2+2017+1-2017}=\dfrac{2017^2-2}{2017^2+1}\)
B=\(\dfrac{(-3)^6.15^3+9^3.(-15)^6}{(-3)^{10}.5^3.2^3}\) Tính?
a)\(\left|x+\dfrac{2}{3}\right|\)=\(\dfrac{5}{6}\) b) \(\left(x-\dfrac{1}{3}\right)^2\)=\(\dfrac{4}{9}\)
Giúp mik làm 2 câu này ạ.
tìm a b thuộc Z biết
a, |a+5|+|b-2|=0
b,|a-2017|+|b-2018|=0
\(\dfrac{5}{9}\):\((\dfrac{1}{11}-\dfrac{5}{22})+\dfrac{5}{9}:(\dfrac{1}{15}-\dfrac{2}{3})\)
2019!-2018!-\(2018^2\)! bằng ?
(x - 3).(x - 4 )=2018 mũ 0 - 1
Help me ?
Cho A=\(\dfrac{1}{2^2}\)+\(\dfrac{1}{3^2}\)+\(\dfrac{1}{4^2}\)+....+\(\dfrac{1}{100^2}\). Chứng minh rằng A<\(\dfrac{3}{4}\)
cho a=1.2+2.3+3.4+...+2017.2018 và b=2018^3/3
so sanhs a va b
Câu 1: Thực hiện phép tính
a/96:2^4 +3^2-2018^0
b/32.77+32.24-32
c/{2.3^2+[144-5^2.(15-169:13)]}-1^2019
d/5^27.5:5^25+|-125|