Question If a=6i+27-3/ then a vector of length 3 units which is parallel to a is 18i+67-9k Answer O A True O B False Question The work done by a force F=2i+57+3/ in moving a particle directly from point A(1,1,3) to point B(4,5,7) equals 38 units. Answer O True O B False Question The cosine of the angle between a = -2i+ j-3k and b=2i-3+3k equals -1 Answer OA True O False Question Differentiating xy3 implicitly with respect to x gives y3+3ryly'. Answer O A True O B FalseIf a=2i+3j-5k and b=-2i+4k , then a.b equals -41+03-20k Answer O A B False Question If a=2i-3+6k then the length of a is a| =v39 Answer O A True O B False Question The vectors a=6i+j-8k and b=2i+43+8k are perpendicular vectors. Answer O A True O B False Question The derivative of y=Vitz2 is y' =3(1+32)-1/2(2x) Answer O A True O B False Question Differentiating y' + 3yay! implicitly with respect to z gives yl + 6yy' +3yly". Answer OA O B False Question Differentiating +2 implicitly with respect to a gives 1+2yy'. Answer O A True O False