Question

Fungsi f(x) = 3x + n dan f(-1) = 7. nilai f(5) - f(1) ....
tlng ya pake jalann..

Answer 1

F(x) = 3x+n
f(-1) = -3+n = 7
n = 7+3
n = 10
sehingga menjadi : f(x) = 3x+10
f(5) = 3.5+10 = 15+10 = 25
f(1) = 3.1+10 = 3 +10 = 13
jadi,selisihnya 25-13 = 12

Answer 2

Pake metode eliminasi dulu buat nyari n nya.

f(-1) = (3 X -1) + n = 7
= -3 + n = 7
n = 10

Terus dimasukin satu-satu dulu.

f(5) = (3 X 5) + 10
= 15 + 10 = 25

f(1) = (3 X 1) + 10
= 3 + 10 = 13

Karena soalnya f(5) - f(1) jadi
25 - 13 = 12