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C4 vectors question 15 watch

1. having trouble converting equations into Cartesian form any hints would be appreciated

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2. If you find you should get .

So the direction of the vector of the equation that has gradient
is .

Think of it this way if a line has a gradient of 4 then the vector that represent sthe direction of the line is .

Then just apply this general direction to find the direction vectors of the curves defined below.
3. (Original post by B_9710)
If you find you should get .

So the direction of the vector of the equation that has gradient
is .

Think of it this way if a line has a gradient of 4 then the vector that represent sthe direction of the line is .

Then just apply this general direction to find the direction vectors of the curves defined below.
Checked my working after reading this and realised i took the second derivative as the gradient,answer matches the one in the book now, thanks

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Updated: February 18, 2016
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