- #1

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P1 (5,2, -3) and P2 (2, -1, 7 )

how would i do this?

just 5i+2j-3k - (2i -1J + 7k)

3i +3j -10k?

looks a bit simple most likely wrong

2.Find the distance between the plane with equation x + y -4z = -15

and the plane parallel to it, which passes through the point (0, 3 , -4)

what i did i used the equation of the plane x + y -4z = 15

and subed (x=0, y=3, z=-4) and i got d2=-1

now i used the formula

d1-d2 / sqrt(a^2 + b^2 + c^2)

15- -1 / sqrt(18)

= 16 / sqrt(18)

is this how you do it? it just seems like im doing something wrong heh

3. On the curve x=t^4 + 2t - 1

y= e^-2t

find d^2y/dx^2 at the point where t=-1

how do i approach this? thanks