2-78 1 2-79 EXERCISES 2.6 non In 14. In each 1. 2x + 3y = 7 2. 5x 7y = 3 - 3. x - y = 5 4. x + y = 12 5. xy = 4 dy Exercises 1 through 8, find in two ways: Childr dx 5145 bas 1 6. x + = = 5 y 7. xy + 2y = 3 10 star a in bo 8. xy + 2y = x (a) by implicit differentiation (b) by differentiating an explicit formula for y. case, show that the two answers are the same. differentiation. 2 9. x + y = 25 L 10. x + y = x + y ,2 11. x + y = xy Trinoma, t 3 12. 5xxy = 2y 2.3 13. y + 2xy 3x + 1 = 0 1 1 + war dy gwom In Exercises 9 through 22, find by implicit dx smulc X - lugar to 20 = 1 yroit 15. x + y = 1 16. 2x + y = 4 SECTION 2.6 IMPLIC rub sib 11. using 520 00 orqanit A SMIDIGEM TA vish bogigolo s omi woll 17. xy - x = y + 2 18. y + 3xy - 4x = 9 juqni MOO MOTO HIGIT buja live llog 10.02 HTWORD