Matematika

Pertanyaan

suatu fungsi dinyatakan dengan rumus f(x)=ax+b, jika f(3)=13 dan f(-1)=1, tentukan:
a. nilai a dan b
b. bentuk fungsi f

2 Jawaban

  • f (x) = ax + b
    f (3) = 13
    f (-1) = 1
    3a + b = 13
    -1a + b = 1
    _______ _
    4a = 12
    a = 12/ 4
    a = 3

    3a + b = 13
    3.3 + b = 13
    9 + b = 13
    b = 13 - 9
    b = 4

    a. a = 3, b = 4
    b. f (x) = 3x + 4
    semoga membantu -,-
  • Chapter Function
    Mathematics
    Class 8 SMP

    Settlement

     f (x) ⇒ ax + b
     f (3) ⇒  3a + b = 13
    f (-1) ⇒ -1a + b = 1          
                  --------------- -                    
                        4a = 12                     
                          a = 3


              3a + b = 13
          3 (3) + b = 13
               9 + b = 13           
                     b = 13 - 9                     
                     b = 4


    Function Shape (Function Formula)

    f (x) = ax + b

    ⇒ f (x) = 3x + 4


    I hope this helps!!!

Pertanyaan Lainnya