# 求x^2在(1, 2)上的积分值
sum = 0
j = 0
epoch = 10000
for i in range(epoch):
sum += (1/ epoch) * (1 + j)**2
j += (1/ epoch)
print(sum)
# 求x^2在(1)上的微分值
delt = 0.00001
x = 1
f = ((x+ delt) ** 2 - (x) ** 2) / delt
print(f)
# 求x^2在(1, 2)上的积分值
sum = 0
j = 0
epoch = 10000
for i in range(epoch):
sum += (1/ epoch) * (1 + j)**2
j += (1/ epoch)
print(sum)
# 求x^2在(1)上的微分值
delt = 0.00001
x = 1
f = ((x+ delt) ** 2 - (x) ** 2) / delt
print(f)