Question

Tolong besok dikumpulin, soal no 3 dikasi penjelasan nya ya, nnti aku ksi pin bb ku

Answer 1

Y = f(x) = ⁵log (ax +b)
ax + b = 5^y

f(2) = 0 --> 2a + b = 5⁰---> 2a + b = 1
f(4) = - 1 --> 4a + b = 5^-1 --> 4a + b = 1/5
kurangkan
- 2a = 4/5  ---> a = - 4/10= - 2/5
2a + b = 1 --> b = 1 - 2a = 1 + 4/5 = 9/5

f(x)= ⁵log (-2/5 x + 9/5)
f(x) = ⁵log 1/5 (9 - 2x)
f(x)= 5log 1/5 + ⁵log (9 - 2x)
f(x) = -1 + ⁵log(9 - 2x)
f(x) = ⁵log(9-2x) - 1