Find the equation for the tangent line:
4x^2 + 9y^2 = 40 at the point (1,2)

Question

Find the equation for the tangent line: 
4x^2 + 9y^2 = 40 at the point (1,2)

anonymous · Answer

solve for y. take derivative. eat cheezeits.

amistre64 · Answer

y = f'(1)x -f'(1)(1) + 2 in this case

amistre64 · Answer

ys already solved for you by the point ... at least thats my assumption without checking it first.  Mathmatickers can be sadistic like that tho

anonymous · Answer

$$8x+18yy'=0$$
$$y'=-\frac{4x}{9y}$$ plug in the numbers

anonymous · Answer

you could in fact solve for y and then take the derivative.  you might want to convince yourself that you get exactly the same solution i wrote.  either numerically or as an expression.  try not to get the cheetos on your homework.  combos neater, but not as tasty