natashadag natashadag
  • 03-01-2017
  • Mathematics
contestada

f(x)=9x^2-5x, g(x)=19x-4
(fog)(9)

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engy1 engy1
  • 03-01-2017
is it (fog)(9) or (fog)(x) ?
Answer Link
Panoyin
Panoyin Panoyin
  • 06-01-2017
f(x) = 9x² - 5x
g(x) = 19x - 4

(f о g)(9) = 9[19(9) - 4]² - 5[19(9) - 4]
(f ο g)(9) = 9(171 - 4)² - 5(174 - 4)
(f ο g)(9) = 9(167)² - 5(167)
(f ο g)(9) = 9(27889) - 865
(f ο g)(9) = 251001 - 865
(f ο g)(9) = 250136
Answer Link

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