bantuin aku dong plisssss
Jawab:
Penjelasan dengan langkah-langkah:
1. f(x)= (¹/₂)ˣ
x= {-2, -1, 0, 1, 2}
maka Rf ={ 4, 2, 1 , ¹/₂, ¹/₄}
Penyataan Benar(T) , alasan:
f(-2)= (¹/₂)⁻² = 4
f(-1) = (¹/₂)⁻¹ = 2
f(0)= (¹/₂)⁰ = 1
f(1) = (¹/₂)¹ = ¹/₂
f(2)= (¹/₂)² = ¹/₄
2. f(x)= a (2)ˣ⁺²
f(-2) = 5 maka f(3) =60
pernyataan salah (F)
alasan f(3)= 160
f(-2)= 5
a(2)⁻²⁺² = 5
a(2)⁰ = 5
a(1) =5
a= 5
f(x) = 5(2)ˣ⁺²
nilai f(3) = 5 (2)³⁺²
f(3) = 5 (32)
f(3) = 160
3) f(x) = 2²ˣ⁻¹ maka nilai f(2) > f(¹/₂)
pernyataan benar (T) , alasan :
f(2) = 2⁴⁻¹ = 2³ = 8
f(¹/₂) = 2¹⁻¹ = 2⁰ = 1
f(2) > f(¹/₂)
