Question

diketahui suatu fungsi dirumuskan dengan g(x) = mx + n. jika g(3) = -13 dan g(-4) = 22,maka nilai m+n adalah
a.-7
b.-3
c.7
d.3

Answer 1

G(3) = m(3) + n
-13 = 3m + n
n= -13 - 3m

g(-4) = m(-4) + n
22 = -4m + n
n= 22+4m

n=n
-13-3m = 24+4m
-13-24 = 4m+3m
-37 = 7m
m = -37/7

22 = -4(-37/7) + n
22 = 148/7 + n
22 = 21,14 + n
n = 0,85 = 17/20