PascalABC.NET
#1
function Y(x:integer) := 2*((x+2)**2)+5.5*(x+2) - 3;
begin
var Xes := Range(3, 25);
Xes.Tabulate(p -> Y(p)).Println;
end.
#2
const PASS = '123ab';
begin
var rpass := Readstring('Pass: ');
while rpass <> PASS do begin
rpass := Readstring('Wrong pass. Try again: ');
end;
print('Correct password. Welcome');
end.
#3
begin
//Сначала читаем цифру, которую надо удалить, а уже потом число.
var X := ReadChar();
var number := ReadInteger().ToString.ToCharArray.ToList;
while number.Contains(X) do number.Remove(X);
number.JoinIntoString.Println;
end.
#4
begin
var X := ReadInteger();
Print((x div 100)+(x mod 100));
end.
Объяснение:
x
2
+
y
2
=
16
...
...
...
...
...
...
.
.
(
1
)
x + y = 4 (2)
rearrange (2) to y = 4 - x (could do x = 4 - y )
substitute y = 4 - x into (1)
hence:
x
2
+
(
4
−
x
)
2
=
16
⇒
x
2
+
16
−
8
x
+
x
2
=
16
and
2
x
2
−
8
x
+
16
−
16
=
0
⇒
2
x
2
−
8
x
=
0
factor and solve : 2x(x - 4 ) = 0
⇒
x
=
0
,
x
=
4
substitute these values into y = 4 - x , to find corresponding values of y.
x = 0 : y = 4 - 0 = 4 → (0 , 4)
x = 4 : y = 4 - 4 = 0 → (4 , 0 )
These are the points of intersection with the line x +y = 4 and the circle
x
2
+
y
2
=
16
Answer link
Объяснение:
