Question

Suatu fungsi dinyatakan dengan. f(x)= ax + b.Nilai f(x)-f(x-1) adalah....

a.b. c.a
b.-b. d.-a

Answer 1

F(x) = ax + b

f(x-1) = a(x-1) + b
         = ax - a + b

f(x) - f(x-1) = ( ax + b ) - ( ax - a + b )
                  = ax - ax + b - b + a
                  = a ==>> (c.)