Jika f:R →R dan g:R →R dengan f(x)=x+6 dan g(x)=2x-5, maka(f(x)-g(x))=….

Jika f:R →R dan g:R →R dengan f(x)=x+6 dan g(x)=2x-5, maka(f(x)-g(x))=….
a. x+2
b. x+3
c. 3x+3
d. -x+11
e. -х-11

Jawaban yang benar adalah D. -x + 11

Sifat :
Soal ini dapat diselesaikan dengan cara mengoperasikan suku sejenis (berpangkat sama)

f(x) = x + 6
g(x) = 2x – 5

f(x) – g(x) = (x + 6) – (2x – 5)
= x + 6 – 2x + 5
= -x + 11

Maka, f(x) – g(x) = -x + 11

Jadi, pilihan yang tepat adalah D.

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 17