Question

Fungsi f : x ⇒ 2x + 3 dgn {x| -3 < x ≤ 5, x ∈ B}.Tentukan daerah hasil fungsi f,..pliss bntu jwab

Answer 1

f(x) = 2x + 3

f(-2) =  -1
f(-1) =   1
f(0)  =   3
f(1)  =   5
f(2)  =   7
f(3)  =   9
f(4)  = 11
f(5)  = 13


Range = { -1 , 1 , 3 , 5 , 7 , 9 , 11 , 13 }

Answer 2

Daerah domain = {-2, -1, 0, 1, 2, 3, 4, 5}
Rumus f(x) = 2x +3

Maka,
f(x) = 2x +3
f(-2) = 2(-2) +3
       = -4 +3 = -1
f(-1) = 2(-1) +3
       = -2 +3 = 1
f(0) = 2(0) +3
       = 3
f(1) = 2(1) +3
     = 2 +3 = 5
f(2) = 2(2) +3
       = 4 +3 = 7
f(3) = 2(3) +3
       = 6 +3 = 9
f(4) = 2(4) +3
       = 8 +3 = 11
f(5) = 2(5) +3
       = 10 +3 = 13

Jadi,daerah hasil fungsinya adalah
{-1, 1, 3, 5, 7, 9, 11, 13}.