19,96+4,19-24,15:(x:\(\frac{1}{4}-\frac{1}{4}\))=23,15
giúp mình với nhá
187-{[497-(8xX+11):X]:3-78}=150
19,96+4,19-24,15:(X:\(\frac{1}{4}\)-\(\frac{1}{4}\))=23,15
7,2:[(0,6xX+8):20+59]=0,12
19,96 +4,19 -24 ,15 :(:1/4-1/4)=23,15
252/x=84/97
x-2/255=114/153
Tìm X :
a) 187 - {[497 - (8 x X + 11) : X] : 3 - 78} = 150
b) 19.96 + 4,19 - 24,15 : (X : \(\frac{1}{4}\)- \(\frac{1}{4}\)) = 23,15
c) (30 : 7\(\frac{1}{2}\)+ 0,5 x 3 - 1,5) x (4\(\frac{1}{2}\)- \(\frac{7}{2}\) ) : (14,5 - X) =10
cảm ơn nhiềuu
Tìm x biết
a) \(\frac{1}{1.3}+\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{47.49}=\frac{24}{x+1}\)
b) \(\frac{4}{1.5}+\frac{4}{5.9}+\frac{4}{9.13}+...+\frac{4}{97.101}=\frac{2x+4}{101}\)
c) \(\frac{x-1}{2017}+\frac{x-2}{2016}=\frac{x-3}{2015}+\frac{x-4}{2014}\)
d) \(\frac{x+1}{2017}+\frac{x+2}{2016}=\frac{x+3}{2015}+\frac{x+4}{2014}\)
1 tìm x biết ;
a, 0-|x + 1| = 5
b, 2 - | \(\frac{3}{4}\)- x | = \(\frac{7}{12}\)
c, 2 | \(\frac{1}{2}\)x - \(\frac{1}{3}\)| - \(\frac{3}{2}\)= \(\frac{1}{4}\)
d, | x - \(\frac{1}{3}\)| = \(\frac{5}{6}\)
e, \(\frac{3}{4}\)- 2 | 2x - \(\frac{2}{3}\)| = 2
f, \(\frac{2x-1}{2}\)= \(\frac{5+3x}{3}\)
1 tìm x biết ;
a, 0-|x + 1| = 5
b, 2 - | \(\frac{3}{4}\)- x | = \(\frac{7}{12}\)
c, 2 | \(\frac{1}{2}\)x - \(\frac{1}{3}\)| - \(\frac{3}{2}\)= \(\frac{1}{4}\)
d, | x - \(\frac{1}{3}\)| = \(\frac{5}{6}\)
e, \(\frac{3}{4}\)- 2 | 2x - \(\frac{2}{3}\)| = 2
f, \(\frac{2x-1}{2}\)= \(\frac{5+3x}{3}\)
1, Tính \(\frac{1}{2}-\left(\frac{1}{3}+\frac{2}{3}\right)+\left(\frac{1}{4}+\frac{2}{4}+\frac{3}{4}\right)-\left(\frac{1}{5}+\frac{2}{5}+\frac{3}{5}+\frac{4}{5}\right)+...+\left(\frac{1}{100}+\frac{2}{100}+\frac{3}{100}+...+\frac{99}{100}\right)\)2,Tính \(\left(1-\frac{1}{2^2}\right)x\left(1-\frac{1}{3^2}\right)x\left(1-\frac{1}{4^2}\right)x...x\left(1-\frac{1}{n^2}\right)\)
C=\(\frac{3}{4}\)x\(\frac{8}{9}\)x\(\frac{15}{16}\)x .............x\(\frac{9999}{10000}\)
D=\(\frac{1}{500}+\frac{3}{500}+\frac{5}{500}+.........+\frac{95}{500}+\frac{97}{500}+\frac{99}{500}\)
E=1\(\frac{1}{3}\)x 1\(\frac{1}{8}\)x 1 \(\frac{1}{15}\)x 1\(\frac{1}{24}\)x.......x 1\(\frac{1}{99}\)
F=\(\frac{4}{1x3}+\frac{4}{3x5}+\frac{4}{5x7}+\frac{4}{7x9}+..........+\frac{4}{17x19}+\frac{4}{19x21}\)
G=\(\frac{1}{11x16}+\frac{1}{16x21}+\frac{1}{21x26}+.....+\frac{1}{56x61}+\frac{1}{66x61}\)
Mọi người giúp mình nha . mai mik phải nộp rùi.thank mọi người nhìu lắm
