Vũ Yến Phương

Bài 3
from math import sqrt
from math import pow
def dodai(ax, ay, bx, by):
return sqrt(pow(bx - ax, 2) + pow(by - ay, 2))
x1= float(input("x1"))
y1= float(input("y1"))
x2= float(input("x2"))
y2= float(input("y2"))
x3= float(input("x3"))
y3= float(input("y3"))
dab= dodai(x1, y1, x2, y2)
dbc= dodai(x2, y2, x3, y3)
dac= dodai(x1, y1, x3, y3)
print("d_AB= {:.3f}".format(dab))
print("d_BC= {:.3f}".format(dbc))
print("d_AC= {:.3f}".format(dac))

Bài 4
a= int(input("a"))
b= int(input("b"))
x= (a-2)*(b-2)
y= a*b-x
print(x)
print(y)

Bài 5
n= int(input("n"))
s= n * (n + 1) // 2
print("result: ", s)

Bài 6
n= int(input("n"))
s= n * (n + 1) * (2 * n + 1) // 6
print("result: ", s)

Bài 7
n= int(input("n"))
print(n * n)

Bài 8
n= int(input("n"))
s= n * (n + 1) // 2
print(s * s)

Bài 9
n= int(input("n"))
s= n * n * (n + 1) * (2 * n * n + 2 * n -1) // 12
print(s)

Bài 10
n= int(input("n"))
s= n * (n + 1) * (n + 2) // 3
print(s)

Bài 11
n= int(input("n"))
s= n / (n + 1.0)
print(s)

Bài 12
n= int(input("n"))
s= n * (n + 3) / (4.0 * (n + 1) * (n + 2))
print(s)

Bài 13
# Tong day so dac biet 1
n= int(input("n"))
s= n * (n + 2) / ((n + 1) ** 2)
print(s)

Bài 14
# Tong day dac biet 2
p=int(input("p"))
n=int(input("n"))
s=(p**(n+1)-1)//(p-1)
print(s)

Bài 15
# Tong day dac biet 2
p=int(input("p"))
n=int(input("n"))
s=((n + 1) * p ** (n + 1)) // (p - 1) - (p ** (n + 1) - 1) // ((p - 1) ** 2)
print(s)

Bài 16
n= int(input("n"))
if n % 2 == 0:
print("N la so chan")
else:
print("N la so le")

Bài 17
n= int(input("n"))
if (n % 3 == 0) and (n % 5 != 0):
print("True")
else:
print("False")

Bài 18
a= int(input("a"))
b= int(input("b"))
rmax= a
if rmax < b:
rmax= b
print(rmax)

Bài 19
a= int(input("a"))
b= int(input("b"))
c= int(input("c"))
rmin= a
if rmin > b:
rmin= b
if rmin > c:
rmin= c
print(rmin)

Bài 20
a= int(input("a"))
b= int(input("b"))
c= int(input("c"))
m= a+b
n= b+c
p= a+c
rmax= m
if rmax < n:
rmax= n
if rmax < p:
rmax= p
print(max)