import numpy as np # mathops-array.py 

arr1 = np.array([1,2,3])
log1 = np.log(arr1)
exp1 = np.exp(arr1)
sqrt = np.sqrt(arr1)

print('arr1:',arr1) 
print('sqrt:',sqrt) 
print('log1:',log1) 
print('exp1:',exp1) 

