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In [1]:

    
import numpy as np



In [2]:

    
a=np.array([[1,2,3],[4,5,6],[7,8,9]])
print(a)









    



[[1 2 3]
 [4 5 6]
 [7 8 9]]



In [3]:

    
b=np.array([[7,8,9],[4,5,6],[1,2,3]])
print(a-b)









    



[[-6 -6 -6]
 [ 0  0  0]
 [ 6  6  6]]



In [4]:

    
c=np.array([1,2,3])
print(np.dot(a,c))



In [ ]: