Dot Product Practice

Geometry Level 1

Consider two vectors α = ( 2 , − 1 , 5 ) \alpha = (2 , -1, 5) and β = ( − 4 , 0 , 1 ) \beta = (-4, 0, 1) .

Calculate their dot product.

Then try Inner Product Practice


The answer is -3.

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Steven Zheng by Steven Zheng , 26, China

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1 solution

Tanishq Varshney
Mar 22, 2015

α . β = 2 × ( − 4 ) + 0 + 1 × 5 \alpha.\beta=2\times (-4)+0+1\times 5 = − 3 -3

as simple as that

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It is tough !

Karan Shekhawat - 6 years, 2 months ago

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Try the inner product. There is a subtle difference because we have complex numbers.

Steven Zheng - 6 years, 2 months ago

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