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Những câu hỏi liên quan
HL
1
6 tháng 7 2023
1 when
2 how many
3 which
4 who
5 why
1 what is on television tonight
2 who is your favorite MC television ?
3 how much time does tina spend watching
4 why do they like to watch cartoons ?
5 what do you like best television programme
20 tháng 11 2023
1: \(\dfrac{15x}{7y^3}\cdot\dfrac{2y^2}{x^2}\)
\(=\dfrac{15x\cdot2y^2}{7y^3\cdot x^2}=\dfrac{30xy^2}{7x^2y^3}=\dfrac{30}{7xy}\)
2: \(\dfrac{6x^3}{7y^4}\cdot\dfrac{35y^2}{24x}\)
\(=\dfrac{6x^3}{24x}\cdot\dfrac{35y^2}{7y^4}\)
\(=\dfrac{x^2}{4}\cdot\dfrac{5}{y^2}=\dfrac{5x^2}{4y^2}\)
3: \(\dfrac{4y^2}{x^4}\cdot\dfrac{-3x^2}{8y}\)
\(=\dfrac{4y^2}{8y}\cdot\dfrac{-3x^2}{x^4}=\dfrac{y}{2}\cdot\dfrac{-3}{x^2}=\dfrac{-3y}{2x^2}\)
4: \(\dfrac{-18y^3}{25x^4}:\dfrac{9y^3}{-15x^2}\)
\(=\dfrac{18y^3}{25x^4}\cdot\dfrac{15x^2}{9y^3}\)
\(=\dfrac{18y^3}{9y^3}\cdot\dfrac{15x^2}{25x^4}=2\cdot\dfrac{3}{5x^2}=\dfrac{6}{5x^2}\)
5: \(\dfrac{8y^2}{9x^2}:\dfrac{4y}{3x^2}\)
\(=\dfrac{8y^2}{9x^2}\cdot\dfrac{3x^2}{4y}=\dfrac{8y^2}{4y}\cdot\dfrac{3x^2}{9x^2}=\dfrac{1}{3}\cdot2y=\dfrac{2y}{3}\)
6: \(\dfrac{-20x}{3y^2}:\dfrac{-4x^3}{5y}\)
\(=\dfrac{20x}{3y^2}:\dfrac{4x^3}{5y}\)
\(=\dfrac{20x}{3y^2}\cdot\dfrac{5y}{4x^3}=\dfrac{20x}{4x^3}\cdot\dfrac{5y}{3y^2}=\dfrac{5}{3y}\cdot\dfrac{5}{x^2}=\dfrac{25}{3x^2y}\)
7: \(\dfrac{\left(x+4\right)^2}{4x+12}:\dfrac{x+4}{3x+9}\)
\(=\dfrac{\left(x+4\right)^2}{4\left(x+3\right)}:\dfrac{x+4}{3\left(x+3\right)}\)
\(=\dfrac{\left(x+4\right)^2}{4\left(x+3\right)}\cdot\dfrac{3\left(x+3\right)}{x+4}=\dfrac{3\left(x+4\right)}{4}\)
8: \(\dfrac{5x+10}{4x-8}\cdot\dfrac{4-2x}{x+2}\)
\(=\dfrac{5\left(x+2\right)}{4\left(x-2\right)}\cdot\dfrac{-2\left(x-2\right)}{x+2}\)
\(=\dfrac{5\cdot\left(-2\right)}{4}=-\dfrac{10}{4}=-\dfrac{5}{2}\)
9: \(\dfrac{x^2-36}{2x+10}\cdot\dfrac{3}{6-x}\)
\(=\dfrac{\left(x-6\right)\left(x+6\right)}{2\left(x+5\right)}\cdot\dfrac{-3}{x-6}\)
\(=\dfrac{-3\left(x+6\right)}{2\left(x+5\right)}\)
10: \(\dfrac{x^2-4}{x^2-x}:\dfrac{x^2+2x}{x-1}\)
\(=\dfrac{\left(x-2\right)\left(x+2\right)}{x\left(x-1\right)}\cdot\dfrac{x-1}{x\left(x+2\right)}\)
\(=\dfrac{\left(x-2\right)}{x^2\left(x+2\right)}\)
HM
1
D
datcoder
CTVVIP
26 tháng 10 2023
Program HOC24;
var st,st1,st2: string;
i,n,d,k,j: integer;
t,m: longint;
a: array[1..10000] of integer;
f: text;
const fi='SUBSUM.INP' ;
fo = 'SUBSUM.OUT' ;
Procedure ip;
begin
assign(f,fi);
reset(f);
readln(f,n,m);
for i:=1 to n do read(f,a[i]);
close(f);
end;
Procedure out;
begin
assign(f,fo);
rewrite(f);
d:=0;
for i:=1 to n-1 do
Begin
If a[i]=m then d:=d+1;
for j:=i+1 to n do
begin
t:=0;
for k:=i to j do t:=t+a[k];
if t=m then d:=d+1;
end;
End;
if a[n]=m then d:=d+1; write(f,d);
close(f);
end;
Begin
ip;
out;
End.
VH
3
14 tháng 9 2019
520 : (515.6+515.19)
=520:[515.(6+19)]
=520:[515.25]
=520:[515.52 ]
=520:[515+2 ]
=520 : 517
=520-17
=53
=125
chúc bạn học tốt
VD
14 tháng 9 2019
=5^20:[5^15(6+9)]
=5^20:[5^15.15]
=5^20.[1/5^15.1/15)
=5^20.1/5^15.1/15
=5^20:5^15.1/15
=5^20-15.1/15
=5^5.1/15
=5^5/15
=5.5^4/5.3
=5^4/3
(=625/3)
NK
0
6. doesn't phone /will leave
7. don't study/won't pass
8. rains / won't have to water
9. won't be able / watch
10. couldn't move / wasn't
11. study/ will pass
12. shines/will walk
13. has/will see
14. came/would be
15. earn/will fly
16. travel/will visit
17. wear/will slip
18. forgets/will give
19. go/will listen
mk ko chắc hết đâu nha bạn ;-;