adwawd

1sum = 0

for i in range(1,101):

sum = sum + 1/i

print (sum)

2

sum = 0

a = 1

for i in range(1,101):

sum = sum + 1/i * a

a = -a

print (sum)

3

sum = 0

a = 0

for i in range (1,100):

a += i

sum += 1/a

print (sum)

sum = 0

a = 2

for i in range (1,7):

sum = sum + a

a = a * 10 + 2

print(sum)

5

sum = 1

t = 1

i = 1

while 1/t > 1e-6:

t = t * i

sum = sum + 1/t

i += 1

print ("%.6f" %sum)

pi = 1

f = -1

i = 3

while 1/i > 1e-6:

pi = pi + 1 / i * f

i = i + 2

f= -f

print(pi*4)