Question

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

Answer 1

solve for y. take derivative. eat cheezeits.

Answer 2

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

Answer 3

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

Answer 4

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

Answer 5

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