Fungsi f:x->(2m+1)x-5m, diketahui f(4)=-2 carilah a. Tentukan m b. Tentukan rumus f(x) c. Tentukan f(4)-f(-2)

a) f(x) = (2m + 1)x - 5m
f(4) = (2m + 1)4 - 5m = - 2
8m + 4 - 5m = - 2
3m = - 2 - 4
3m = - 6
m = - 2

b) f(x) = (2m + 1)x - 5m
f(x) = (2•-2 + 1)x - 5(-2)
f(xl = ( -4 + 1)x + 10
f(x) = - 3x + 10

c) f(4) = - 3(4) + 10 = - 12 + 10 = - 2
f(-2) = - 3(-2) + 10 = 6 + 10 = 16
f(4) - f(-2) = - 2 - 16 = - 18