5dregensleyer
F(a) => 10 - 3a = 28 - 3a = 28 -10 -3a = 18 a = 18/-3 a = -6 maka nilai a = -6
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WahyuDwiCahyani1
Rumus fungsi f(x)=10-3x jika f(a)=28. maka nilai a adalah? Jawab.: Diketahui : f(x) = 10-3x
f(a) = 28
Ditanya : Berapa nilai a?
Jawab :
f(a) => f(a) = 28
10 - 3(a) = 28
10 - 3a = 28
-3a = 28 – 10
-3a = 18
a = 18/(-3)
a = -6
Maka, nilai a adalah -6
f(3x) : 28- 10
3x : 18
x : 18/3 : 6
- 3a = 28 -10
-3a = 18
a = 18/-3
a = -6
maka nilai a = -6