\(\left|97\frac{2}{3}-125\frac{3}{5}\right|+97\frac{2}{3}-125\frac{3}{5}\)
\(=\left|-\frac{419}{15}\right|+\left(-\frac{419}{15}\right)\)
\(=\frac{419}{15}+\left(-\frac{419}{15}\right)=0\)
học tốt ~~
\(\left|97\frac{2}{3}-125\frac{3}{5}\right|+97\frac{2}{3}-125\frac{3}{5}\)
\(=\left|-\frac{419}{15}\right|+\left(-\frac{419}{15}\right)\)
\(=\frac{419}{15}+\left(-\frac{419}{15}\right)=0\)
học tốt ~~
giải PT: a, (4x-5)2 (2x-3)(x-1)=9
b,\(\frac{5}{x-8}+1=\frac{23}{x^2-5x-24}+\frac{2}{x+3}\)
c,(\(\left(\frac{x-1}{99}+\frac{x-99}{1}\right)+\left(\frac{x-3}{97}+\frac{x+97}{3}\right)+\left(\frac{x-5}{93}+\frac{x-95}{5}\right)=6\)
tính :
\(\left(8x^3-\frac{1}{125}y^3\right):\left(4x^2+\frac{1}{25}y^2+\frac{2}{5}xy\right)\)
Giải các phương trình sau:
a) \(\left(\frac{x+2}{98}+1\right)+\left(\frac{x+3}{97}+1\right)=\left(\frac{x+4}{96}+1\right)+\left(\frac{x+5}{95}+1\right)\)
b) \(\frac{4x+3}{5}-\frac{6x-2}{7}=\frac{5x+4}{3}+3\)
Giải các phương trình sau:
a) \(\left(\frac{x+2}{98}+1\right)+\left(\frac{x+3}{97}+1\right)=\left(\frac{x+4}{96}+1\right)+\left(\frac{x+5}{95}+1\right)\)
b) \(\frac{4x+3}{5}-\frac{6x-2}{7}=\frac{5x+4}{3}+3\)
Giải phương trình :
a) \(\frac{x+1}{99}+\frac{x+2}{98}+\frac{x+3}{97}=\frac{x+4}{96}+\frac{x+5}{95}+\frac{x+6}{94}\)
b) \(\frac{1}{3}.x-\frac{1}{2}=\left(\frac{3}{5}-4.x\right).\frac{15}{7}\)
Giải các phương trình sau bằng cách đưa về dạng ax + b = 0:
\(a,\frac{x-23}{24}+\frac{x-23}{25}=\frac{x-23}{26}+\frac{x-23}{27}\)
\(b,\left(\frac{x+2}{98}+1\right)+\left(\frac{x+3}{97}+1\right)=\left(\frac{x+4}{96}+1\right)+\left(\frac{x+5}{95}+1\right)\)
Tính nhanh
a,\(A=100^2-99^2+98^2-97^2+...+2^2-1^2\)
b,\(B=\left(20^2+18^2+...+2^2\right)-\left(19^2+17^2+....+3^2+1^2\right)\)
c,\(C=\frac{780^2-220^2}{125^2+150.125+75^2}\)
d,\(D=2.\left(a+5\right).\left(a+4\right)-\left(a+5\right)^2-\left(a^2-9a-17\right)\)với a=99
1.Giải các phương trình
1) \(\frac{3x-1}{x-1}-\frac{2x+5}{x+3}+\frac{4}{x^2+2x-3}=1\)
2) \(2x\left(8x-1\right)^2\left(4x-1\right)=9\)
3) \(\left(\frac{x-1}{99}+x-99\right)+\left(\frac{x-3}{97}+\frac{x-7}{93}\right)+\left(\frac{x-5}{95}+\frac{x-95}{5}\right)=6\)
2. Giải các bất phương trình
1) \(\left(x+1\right)^2\left(x+2\right)+\left(x+1^2\right)\left(x-2\right)>12\)
2) \(\frac{x-214}{86}+\frac{x-132}{84}+\frac{x-54}{82}>6\)
Xin mn hãy giúp mk. Cảm ơn rất nhiều!!!
Giải phương trình :\(\left(\frac{3}{1\cdot3}+\frac{3}{3\cdot5}+......+\frac{3}{97\cdot99}\right)\left(2x+1\right)=x+\frac{1}{33}\)