Question about Cell Phones
The ways to express multiplication
X: Cross aXb means a times b
. dot 3.a means three times a or 3 a
No sign : implied multiplication (3a+5)(2b-7)=(3a+5)X(2b-7)
Repeated multiplication aXaXaXa= a^4. This is read a to the 4th power, or a exponent 4.
With vectors you have two other types of multiplication.
Scalar product (also called dot product) vect(a).vect(b)
Vector product; vec(a)Xvec(b)
You have multiplication of complex numbers, and multiplications of matrices, multiplication of tensors.
Posted on Oct 22, 2013
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Posted on Jan 02, 2017
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