Question

2.suatu fungsi f:x --> 3x-5
nilai f(8)
nilai f(-3)
3.suatu fungsi f(x)=4x+2 jika f(x)=30 nilai x = ...
4.suatu fungsi h(x)= 5x+2 dengan domain {-2,-1,0,1,2,3} Tentukan daerah range = ...

dibantu yaa kak beserta caranya

Answer 1

F(x) = 3x-5
1. f(8) = 3(8)-5
         = 24-5 = 19
2. f(-3) = 3(-3)-5
          = -9-5 = -14
3. f(x) = 4x+2
    f(x) = 4x+2 = 30
           4x = 28
             x = 7
4. h(x) = 5x+2
    h(-2) = 5(-2) + 2
            = -10+2 = {-8}
   h(-1) = 5(-1) + 2
           = -5 + 2 = {-3}
   h(0) = 5(0) + 2
         = 0 + 2 = {2}
   h(1) = 5(1) + 2
             5+2 = {7}
   h(2) = 5(2) + 2
             10 + 2 = {12}
   h(3) = 5(3) + 2
             15+2 = {17}
Daerah hasil (range) =[{-8,-3,2,7,12,17}]