Question

30 POINT !!! tolong jawab secepatnya kumpul besok makasih

Answer 1

8)
a) g(x) = x² + 2x , 1 ≤ x < 4
b) Nilai g(x) ..
g(1) = 1²+ 2(1) = 3
g(2)= 2² + 2(2) = 8
g(3) =3² + 2(3) = 15

c) g(x+3)  = (x+3)² + 2( x+ 3)
g(x+3) = x² + 6x +9 + 2x + 6
g(x+3) = x² + 8x + 15

9) p = 6 , lebar = l
Luas  = pl 
L = 6l

10)
f(x) = 3x² - 7x
f(x-1) + f(3x) = 3(x-1)² - 7(x-1)  + 3 (3x)² -7(3x)
f(x-1) + f(3x) = 3(x²-2x+1) - 7x +7 + 3(9x²) - 21 x
f(x-1) + f(3x) = 3x² -6x + 3 - 7x + 7 + 27x² - 21x
f(x-1) + f(3x) = 30x² -34x + 10