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zheka24 [161]
3 years ago
8

Find a.b. a=[4,1,1/4], b=[6,-3, -8]

Mathematics
1 answer:
Genrish500 [490]3 years ago
3 0

Answer:

a.b =19

Step-by-step explanation:

We are given the following in the question:

a=\langle 4,1,\frac{1}{4} \rangle, b=\langle 6,-3,-8\rangle

We have to find the dot product.

Formula:

a = \langle x_1,x_2,x_3\rangle\\b = \langle y_1.y_2,y_3\rangle\\a.b = x_1y_1 + x_2y_2 + x_3y_3

Putting the corresponding values we get,

a.b = (4.6) + (1.-3) + (\frac{1}{4}.-8)\\= 24-3-2\\=19

a.b =19    

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Step-by-step explanation:

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Step-by-step explanation:

The surface area of a sphere is given by:

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