Tuesday, July 14, 2020

Matematika Sukino Kelas XI Jilid 2B BAB 11 Turunan LKS 3 no 14

Kunci Jawaban Matematika Sukino
Soal dan Pembahasan Buku Matematika Sukino Kelas 11
Kelas XI
Bab 11 Turunan

A.

14. Jika f (x + 3) = x2 + 2x + 1 , maka f ' (x) = ...

a. 2(x +1)
b. 2x
c. 2(x - 2)
d. 2(x - 4)
e. 4x -2


Jawaban : C

f (x + 3) = x2 + 2x + 1

misalkan a = x + 3
x = a - 3

f (a) = (a - 3)2 + 2(a - 3) + 1
f (a) = a2 - 6a + 9 + 2a - 6 + 1
f(a) = a2 - 4a + 4
f(x) = x2 - 4x + 4
f ' (x) = 2x - 4
f ' (x) = 2(x - 2)



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