See attached file for full problem description.
1) Find the canonic equation of the straight (recta) in the space( espacio), with R

2) Calculate the scaling product of the vectors r y s knowing that r = 3i + 4j; that the module of the vector / s/ = 6; and the angle that both vectors form is 120°

3)Find the following limits

a) =

b) =

4) Find the value of the derivative of y = , so x = 4

5) Three gears whose ratios are 17, 16 and 15 cm. are supported by a triangular base that has as its vertex the centre of each gear. What is the measure of those interior angles of the triangle?

Vectors and limits are investigated. The solution is detailed and well presented. The response was given a rating of "5/5" by the student who originally posted the question.

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