Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{1996\times1997+1998\times3+1994}{1997\times1999-1997-1997}=\frac{1996\times1997+\left(1997+1\right)\times3+1994}{1997\times\left(1999-1-1\right)}\)
\(=\frac{1997\times1996+1997\times3+1997}{1997\times1997}=\frac{1997\times\left(1996+3+1\right)}{1997\times1997}=\frac{2000}{1997}\)
1988x1996+1997x1997+1985
=(1985+3)x1996+(1996+1)x1997+1985
=1985x1996+3x1996+1996x1997+1997+1985
=(1985+1)x1996+1996x1997+3x1996+1997
=1986x1996+1996x1997+3x1996+1997
=1986x1996+3x1996+1996x1997+1997
=(1986+3)x1996+(1996+1)x1997
=1989x1996+1997x1997
=3970044+3988009
=7958053
\(\frac{1997x1999-1}{1997x1998+1996}=\frac{1997x\left(1998+1\right)+1}{1997x1998+1996}\)=\(\frac{1997x1998+1997-1}{1997x1998-1996}\)=\(\frac{1997x1998-1996}{1997x1998-1996}=1\)
1997x1999-1 / 1996+1997x1998=3992003-1/1996+1997x1998=3992002/1996+3990006
=3992002/3992002=1
co so so hang la:
(34-1):3+1=12(so hang)
suy ra co 12 x.
ta co:
(x x12)+(1+4+7+...+31+34)
xet 1+4+...+31+34
co so cap la:
12:2=6(cap)
tong la:
(34+1)x6=210
ta co:x x12+210=222
x x12=12
x=1
dapso :x=1.
(x-5)x(1995x1996+1996x1997)=1234x5678x(630-315x2)
(x-5)x[1996x(1995+1997)]=7006652x(630-630)
(x-5)x[1996x3992]=7006652x0
(x-5)x7968032=0
(x-5) =0:7968032
(x-5) =0
x =0+5
x =5
Chúc bn học tốt
hình như ko có cộng 1994 .
1996 x 1997 + 1998 x \(\frac{3}{1997}\) x 1999 - 1997 x 1997
= 3986012 + \(\frac{5994}{1997}\) x 1999 - 1997 x 1997
= 3986012 + 6000003005 x 1999 - 1997 x 1997
= 3986012 + 1199400601 - 3988009
= 1203386613 - 3988009
= 1199398604