Trương Hà Phúc bài 1->5

Bài 1:

from math import sqrt
x1=int(input())
y1=int(input())
x2=int(input())
y2=int(input())
d=sqrt((x2-x1)**2+(y2-y1)**2)
print("{:.3}".format(d))

Bài 2:

from math import sqrt
a=int(input())
b=int(input())
c=int(input())
d=a+b+c
p=d/2
s=sqrt(p*(p-a)*(p-b)*(p-c))
print(d)
print("{:.3}".format(s))

Bài 3

from math import sqrt
def dodai(xa,ya,xb,yb):
a=xb-xa
b=yb-ya
c=sqrt(a**2+b**2)
return c
x1=int(input())
y1=int(input())
x2=int(input())
y2=int(input())
x3=int(input())
y3=int(input())
AB=dodai(x1,y1,x2,y2)
AC=dodai(x1,y1,x3,y3)
BC=dodai(x2,y2,x3,y3)
print("{:.3}".format(AB))
print("{:.3}".format(AC))
print("{:.3}".format(BC))

Bài 4:

a=int(input())
b=int(input())
c=(a-2)*(b-2)
d=a*b-c
print(c)
print(d)

Bài 5:

n=int(input())
s=(n*(n+1))/2
print(s)

Bài 6:

n = int(input())
s = n*(n+1)*(2*n+1)/6
print(s)


Bài 7:

n=int(input())
s=n*n
print(s)


Bài 8:

n=int(input())
s=(n*(n+1)/2)*(n*(n+1)/2)
print(s)


Bài 9:

n=int(input())
s=n*n*((n+1)**2)*(2*n*n+2*n-1)/12
print(s)


Bài 10:

n=int(input())
s=n*(n+1)*(n+2)/3
print(s)


Bài 11:

n=int(input())
s=n/(n+1)
print(s)


Bài 12:

n=int(input())
s=n*(n+3)/(4*(n+1)*(n+2))
print(s)


Bài 13:

n=int(input())
s=n*(n+2)/((n+1)**2)
print(s)


Bài 14:

p=int(input())
s=(p**(p+1)-1)/(p-1)
print(s)


Bài 15:

n=int(input())
p=int(input())
s= (n+1)*p**(n+1)/(p-1)-(p**(n+1)-1)/(p-1)**2
print(s)