cau hoi an diem ne
1+2+6+45+32+12-30(1+1-2)=?
ai nhanh nhat va dung nhat minh se tang 1 mk
Cac ban tham gia cau hoi nay thi 3 ban nhanh nhat va dung nhat minh se tick cho
Cau hoi 1 ne:1=2
Vay cac ban thu suy nghi xem 2=?
tong cua hai so la 2021 neu tang so thu nhat 12 don vi va giam di so thu hai 2 don vi thi tong moi se la bao nhieu?
ai tra loi nhanh nhat va dung nhat mk se tick dung cho
Tổng mới = 2031 nha
to thay hai nguoi ra dap an cung mot luc nen mk se k dung cho ca hai
1.Diem khac nhau giua Nguoi toi co va Nguoi tinh khon ve mat con nguoi.
2.Cac tang lop co dai phuong Tay,the nao la xa hoi chiem huu no le?
3.Cac thanh tuu van hoa co dai phuong Tay,thu danh gia cac thanh tuu van hoa lon cua thoi co dai
4.Hoc lich su de lam gi?
Ai nhanh nhat,tra loi du y nhat va dung nhat ,minh se tick nhe!
1.tinh
A= 1/2 +5/6 +11/12 +19/20 +29/30 +41/42 +55/56 + 71/72 + 89/90
Ai lam dung va nhanh nhat minh se like !!!!!!!!!!!!!!!!!!!!!!!!!
A = \(\frac{1}{2}+\frac{5}{6}+\frac{11}{12}+...+\frac{89}{90}\)
A = \(\frac{1}{2}+\left(1-\frac{1}{6}\right)+\left(1-\frac{1}{12}\right)+...+\left(1-\frac{1}{90}\right)\)
A = \(\left(1+1+...+1\right)-\left(\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+...+\frac{1}{90}\right)\)
A = \(9-\left(\frac{1}{1.2}+\frac{1}{2.3}+...+\frac{1}{9.10}\right)\)
A = \(9-\left(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+....+\frac{1}{9}-\frac{1}{10}\right)\)
A = \(9-\left(1-\frac{1}{10}\right)=9-\frac{9}{10}\)
A = \(\frac{81}{10}\)
\(A=\frac{1}{2}+\frac{5}{6}+\frac{11}{12}+...+\frac{89}{90}=\left(1-\frac{1}{2}\right)+\left(1-\frac{1}{6}\right)+\left(1-\frac{1}{12}\right)+...+\left(1-\frac{1}{90}\right)\)
\(=\left(1+1+1+...+1\right)-\left(\frac{1}{2}+\frac{1}{6}+...+\frac{1}{90}\right)=10-\left(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+...+\frac{1}{9.10}\right)\)
\(=10-\left(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{9}-\frac{1}{10}\right)=10-\left(1-\frac{1}{10}\right)=10-\frac{9}{10}=\frac{91}{10}\)
\(\frac{1}{2}+\frac{5}{6}+\frac{11}{12}+\frac{19}{20}+...+\frac{89}{90}\)
\(=1-\frac{1}{2}+1-\frac{1}{6}+1-\frac{1}{12}+1-\frac{1}{20}+...+1-\frac{1}{90}\)
\(=9-\left(\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+...+\frac{1}{90}\right)\)
\(=9-\left(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+...+\frac{1}{9.10}\right)\)
\(=9-\left(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+....+\frac{1}{9}-\frac{1}{10}\right)\)
\(=9-\left(1-\frac{1}{10}\right)\)
\(=9-\frac{9}{10}=\frac{81}{10}\)
Cau hoi : Duong nao dai nhat ? ai tra loi dung minh se tk cho va ket ban luon
x+2*x+3*x+4*x+...+100=15150
lan nay se tang 5 tick cho cau tra loi nhanh va dung nhat
x + 2.x + 3.x + 4.x + ... + 100.x = 15150
x.(1 + 2 + 3 + 4 + ... + 100) = 15150
x.(1 + 100).100:2 = 15150
x.101.50 = 15150
x.5050 = 15150
x = 15150 : 5050
x = 3
Vậy x = 3
Dấu chấm là nhân nha, chỗ ngay cạnh dấu = bn vít thíu số x
x + 2.x + 3.x + 4.x + ... + 100.x = 15150
x.(1 + 2 + 3 + 4 + ... + 100) = 15150
x.(1 + 100).100:2 = 15150
x.101.50 = 15150
x.5050 = 15150
x = 15150 : 5050
x = 3
Vậy x = 3
Dấu chấm là nhân nha, chỗ ngay cạnh dấu = bn vít thíu số x
ban Edogawa Conan copy cua ban soyeon_Tiểu bàng giải
Ket qua cua tong: A = 1/2 + 1/6 + 1/12 + 1/20 + 1/30 + 1/42 + 1/56 = ............
Ai giai nhanh nhat va ghi ro cach lam ra ( ko ghi ....... ) thi minh se tick cho nha, minh dang can gap^^^
TA CÓ:\(A=\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+\frac{1}{30}+\frac{1}{42}+\frac{1}{56}\)
\(=\frac{1}{2}+\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+\frac{1}{5.6}+\frac{1}{6.7}+\frac{1}{7.8}\)
\(=\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+\frac{1}{5}-\frac{1}{6}+\frac{1}{6}-\frac{1}{7}+\frac{1}{7}-\frac{1}{8}\)
\(=\frac{1}{2}+\frac{1}{2}-\frac{1}{8}\)
\(=1-\frac{1}{8}=\frac{7}{8}\)
A = 1/2 + 1/6 + 1/12 + 1/20 + 1/30 + 1/42 + 1/56 = 7/8
= 6/12 + 2/12 + 1/12 + 3/60 + 2/60 + 8/336 + 6/336
= 9/12 + 5/60 + 14/336
= 5/6 + 1/24 = 7/8
ai ket bn voi minh nhanh nhat se dc tick 3 cai voi 2 nich phu va 1 nich chinh
(nhanh tay len nhe 1 nguoi duy nhat va nhanh nhat se dc tick)
hom nay minh tung cau hoi de cho may ban lay diem hoi dap ne >"<>"<>"<>"<
20+11+67+32
bna nao se nhanh nhat minh tick cho nhar
20 + 11 + 67 + 32 = 130 nha!