Ответ:

1.

program z1;

var i,n,S: integer;

begin

write ('n = ');

read (n);

S:=0;

write ('S = ');

for i:=1 to n do

begin

write (i*2-1,'^2');

if i<n then write (' + ') else write (' = ');

S:=S + sqr(i*2-1)

end;

write (S)

end.

2.

program z2;

var i,n,S: integer;

begin

write ('n = ');

read (n);

S:=0;

i:=1;

write ('S = ');

repeat

write (i*2-1,'^2');

if i<n then write (' + ') else write (' = ');

S:=S + sqr(i*2-1);

i:=i+1

until i>n;

write (S)

end.

3.

program z3;

var i,n,S: integer;

begin

write ('n = ');

read (n);

S:=0;

i:=1;

write ('S = ');

while i<=n do

begin

write (i*2-1,'^2');

if i<n then write (' + ') else write (' = ');

S:=S + sqr(i*2-1);

i:=i+1  

end;

write (S)

end.

Объяснение:

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