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Note that MATHhere.

  1. Problem 2. $4x^{2}+9y^{2}=36.$ Ans: MATHThis implies that MATH

  2. Problem 4. $x^{2}-2xy+y^{3}=c.$ Ans: MATH and solve for $y^{\prime }.$

  3. Problem 6. MATHAns: MATH and solve for $y^{\prime }.$

  4. Problem 8. MATH Ans: MATH and solve for $y^{\prime }.$

  5. Problem 10. $x\cos y+y\cos x=1.$ Ans: MATH and solve for $y^{\prime }.$

  6. Problem 12. MATH Ans: MATH and solve for $y^{\prime }.$