Question

Viết chương trình tính tổng :

1, \(\dfrac{1}{1.2}+\dfrac{1}{2.3}+\dfrac{1}{3.4}+.....\dfrac{1}{n\left(n+1\right)}\)

2, \(\dfrac{1}{1}+\dfrac{1}{3}+\dfrac{1}{5}+.....\dfrac{1}{2n-1}\)

Answer 1

progrỉnam bai1;

var n,i:longint;

s:real;

begin

write('N= ');readln(n);

s:=0;

for i:=1 to n do

s:=s+1/i*(i+1);

writeln('Tong la ',s);

readln

end.

Answer 2

1) var n,i:integer;

s:real;

begin

write('n=');readln(n);

s:=0;

for i:=1 to n do s:=s+(1/(i*(i+1)));

writeln(' Tong la: ',s);

readln;

end.

2) var n,i:integer;

s:real;

begin

write('n=');readln(n);

s:=0;

for i:=1 to n do s:=s+(1/((2*i)-1));

writeln(' Tong la: ',);

readln;

end.