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Tentukan turunan pertama dari

tentukan turunan pertama dari
a. j(x) = (- 3x² – 6x + 5)/(8x + 8)
b k (x) = (x⁴ – 11x² – 8x + 9)/(5x⁷ + 11x + 7)

Jawaban: -(3x²+6x+11)/(8x²+16x+8) dan ((4x³-22x-8)(5x⁷+11x+7)-(x⁴-11x-8x+9)(35x⁶+11))/(5x⁷+11x²-8x+9)²

Jika y = ax^n maka y’ = n.ax^(n-1)
Jika y = u/v maka y’ = (u’v-uv’)/v²

Pembahasan:
a. j(x) = (- 3x² – 6x + 5)/(8x + 8)
u = -3x²-6x+5 → u’ = -6x-6
v = 8x+8 → v’ = 8
j'(x) = (u’v-uv’)/v²
= ((-6x-6)(8x+8)-(-3x²-6x+5)8)/(8x+8)²
= (-48x²-48x-48x-48+24x²+48x-40)/(8x+8)²
= (-24x²-48x-88)/(64x²+128x+64)
= -8(3x²+6x+11)/(8(8x²+16x+8))
= -(3x²+6x+11)/(8x²+16x+8)

b k (x) = (x⁴ – 11x² – 8x + 9)/(5x⁷ + 11x + 7)
u = x⁴-11x²-8x+9 → u’ = 4x³-22x-8
v = 5x⁷+11x+7 → v’ = 35x⁶+11
k'(x) = (u’v-uv’)/v²
= ((4x³-22x-8)(5x⁷+11x+7)-(x⁴-11x-8x+9)(35x⁶+11))/(5x⁷+11x²-8x+9)²

Jadi, jawaban dari soal a dan b adalah seeprti yang disebutkan di atas.

Baca Juga :  Complete the sentences with a form of the verb in parentheses. Three hundred and fifty years ago, people (1. make) /made/ their own clothes. They (2. have, not) _____ machines for making clothes. There (3. be, not) _____ any clothing factories. People (4. tear) _____ homemade clothes that were sewn by hand. Today, very few people (5. make) _____ their own clothes. Clothing (6. come) _____ ready-made from factories. People (7. buy) _____ almost all their clothes from stores. The modern clothing industry (8. be) _____ international. As a result, people from different countries often (9. wear) _____ similar clothes. For example, people in many different countries throughout the world (10. wear) _____ jeans and t-shirts. However, some regional differences in clothing still (11. exist) _____ for instance, people of the Arabian deserts (12. wear) _____ loose, flowing lobes to protect themselves from the heat of the sun. In parts of Northern Europe, fur hats (13. be) _____ common in the winter. In the future, there (14. be, probably) _____ fewer and fewer differences in clothing. People throughout the world (15. wear) _____ clothes from the same factories. (16. We all, dress) _____ in the future? TV shows and movies about the future often (17. show) _____ everybody in a uniform of some kind. What (18. you, think) _____? Number 13