cho m=1^1+2^2+3^3+...+100^100.chung to rang m cos 201 chu so va tinh tong hai chu so dau tien
Bài1: tìm x biết
a) l x - 3,5 l = 7,5
b) l x + \(\dfrac{4}{5}\) l - \(\dfrac{1}{2}\) = 0
c) 3,6 - l x - 0,4 l = 0
d) \(\dfrac{-5}{12}\) : | \(\dfrac{-5}{6}\) : x | = \(\dfrac{-5}{9}\)
e) | x - 3,5|+|4,5- x|=0
bài 2:tính hợp lý
a) (-4,3)=[(-7,5)=(4,3)]
b) 45,3 + [(7,3)+(-22)]
c) [(-11.7)+5.5]+[11.7+(2.5)]
d) [(-6.8)+(-56.9)]+[2.8+5.9]
so sanh phân số -22/35 và -103/177
Tính:
0,4(3) + 0,6(2). 2\(\dfrac{1}{2}\). [(\(\dfrac{1}{2}\) + \(\dfrac{1}{3}\)):0,5(8)] : \(\dfrac{50}{53}\)
\(\dfrac{2^{19}+27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}}\)
so sanh
a) \(5^{20}và2550^{10}\)
b)\(999^{10}và999999^5\)
c)\(\left(\dfrac{-1^{300}}{5}\right)và\left(\dfrac{-1^{500}}{3}\right)\)
(6,5)nhân 5,7+5,7nhân(-3,5)
\(\dfrac{x+1}{x+2}=\dfrac{0,8}{1,2}\)
a) /-6,2/ - /-3,5/ - 6,2 + /7/
giúp mk nha chiều đi học rùi
B=\(\frac{1}{3}-\frac{3}{4}-\left(-0,6\right)+\frac{1}{64}-\frac{2}{9}-\frac{1}{36}+\frac{1}{15}\)
C=\(\frac{1}{3}-\frac{3}{5}+\frac{5}{7}-\frac{7}{9}+\frac{9}{11}-\frac{11}{13}+\frac{13}{15}+\frac{11}{15}+\frac{11}{13}-\frac{9}{11}+\frac{7}{9}-\frac{5}{7}+0,6-\frac{1}{3}\)
D=\(\frac{1}{99}-\frac{1}{99.98}-\frac{1}{98.97}.....-\frac{1}{3.2}-\frac{1}{2.1}\)
