♪ chia ra thôi ♪...đợi...a chia ko hết à?

= \(\dfrac{760284}{89}\)

= \(\dfrac{4578}{5}\)

= 1234

báo c

D

D nha 

bằng 1

Ta có\(M=\left[\left(1+\frac{1}{98}\right)+\left(\frac{1}{2}+\frac{1}{97}\right)+...+\left(\frac{1}{49}+\frac{1}{50}\right)\right].2.3...98\)

\(=\left[\frac{99}{1.98}+\frac{99}{2.97}+...+\frac{99}{49.50}\right].2.3...98=99\left(\frac{1}{1.98}+\frac{1}{2.97}+...+\frac{1}{49.50}\right).2.3...98\)

\(=99\left(\frac{k_1+k_2+...+k_{49}}{1.2.3...98}\right).2.3...98\left(k_1,k_2...k_{49}\varepsilonℕ^∗\right)=99\left(k_1+k_2+...+k_{49}\right)⋮99\Rightarrow M⋮99\left(đpcm\right)\)

Trẻ trâu hỏi cái loz

Con mẹ mày à

lz-12l=98

\(\Rightarrow\)z-12=98 hoac z-12=-98

th1:z-12=98

z=98+12

z=110

th2:z-12=-98

z=-98+12

z=-86

vay z=110 hoac z = -86

lx-98l=0+98

lx-98l=98

\(\Rightarrow\)x-98=98 hoac x-98=-98

th1:x-98=98

x=98+98

x=196

th2:x-98=-98

x=-98+98

x=0

vay x=196 hoac x = 0

chuan do nhe   l i k e    mk nha

98 x a + b x 98 - c x 98 = 98 x (a+b-c) = 98 x 160 = 15680

98 x a + b x 98 - c x 98
=98x(a+b-c)
=98x160
=15680

\(x\times98+x:0,5=2017\)

\(x\times98+x\times2=2017\)

   \(x\times\left(98+2\right)=2017\)

             \(x\times100=2017\)

                          \(x=2017:100\)

                          \(x=20,17\)

\(x\times98+x\div0,5=2017\)

\(x\times98+x\times2=2017\)

\(x\times\left(98+2\right)=2017\)

\(x\times100=2017\)

\(x=2017\div100\)

\(x=20,17\)

x x 98 + x : 0,5 = 2017

x x 98 + x x 2 = 2017

x x ( 98 + 2 ) = 2017

x x 100 = 2017

x = 2017 : 100

x = 2017

\(\frac{x-1}{99}+\frac{x-2}{98}+\frac{x-3}{97}+\frac{x-4}{96}=4\)

\(\Leftrightarrow\left(\frac{x-1}{99}+\left(-1\right)\right)+\left(\frac{x-2}{98}+\left(-1\right)\right)+\left(\frac{x-3}{97}+\left(-1\right)\right)+\left(\frac{x-4}{96}+\left(-1\right)\right)=0\)

\(\Leftrightarrow\frac{x-100}{99}+\frac{x-100}{98}+\frac{x-100}{97}+\frac{x-100}{96}=0\)

\(\Leftrightarrow\left(x-1\right).\left(\frac{1}{99}+\frac{1}{98}+\frac{1}{97}+\frac{1}{96}\right)=0\)

\(\Leftrightarrow x-1=0\)

\(\Leftrightarrow x=1\)