Diketahui sebuah Fungsi yaitu :
f(x) = 5x - 7
Maka tentukan nilai dari :
f(2) = ?
f(-3) = ?
f(-2) = ?
f(4) = ?
f(5) = ?
easy easy :-;
f(x) = 5x - 7
Maka tentukan nilai dari :
f(2) = ?
f(-3) = ?
f(-2) = ?
f(4) = ?
f(5) = ?
easy easy :-;
f(2) = 3
f(-3) = -22
f(-2) = -17
f(4) = 13
f(5) = 18
Penjelasan dengan langkah-langkah:
f(x) = 5x - 7
f(2) = 5(2) - 7
f(2) = (5.2) - 7
f(2) = 10 - 7
f(2) = 3
__
f(x) = 5x - 7
f(-3) = 5(-3) - 7
f(-3) = (5.(-3) - 7
f(-3) = -15 - 7
f(-3) = -(15+7)
f(-3) = -22
(-) - (+) = (-)
__
f(x) = 5x - 7
f(-2) = 5(-2) - 7
f(-2) = (5.(-2) - 7
f(-2) = -10 - 7
f(-2) = -(10+7)
f(-2) = -17
(-) - (+) = (-)
__
f(x) = 5x - 7
f(4) = 5(4) - 7
f(4) = (5.4) - 7
f(4) = 20 - 7
f(4) = 13
__
f(x) = 5x - 7
f(5) = 5(5) - 7
f(5) = (5.5) - 7
f(5) = 25 - 7
f(5) = 18
Penjelasan dengan langkah-langkah:
x → 2
f(x) = 5x - 7
f(2) = 5(2) - 7
f(2) = 10 - 7
f(2) = 3
_____
x → -3
f(x) = 5x - 7
f(-3) = 5(-3) - 7
f(-3) = -15 - 7
f(-3) = -22
_____
x → -2
f(x) = 5x - 7
f(-2) = 5(-2) - 7
f(-2) = -10 - 7
f(-2) = -17
_____
x → 4
f(x) = 5x - 7
f(4) = 5(4) - 7
f(4) = 20 - 7
f(4) = 13
_____
x → 5
f(x) = 5x - 7
f(5) = 5(5) - 7
f(5) = 25 - 7
f(5) = 18
Kesimpulan:
Maka nilai dari :
f(2) = 3
f(-3) = -22
f(-2) = -17
f(4) = 13
f(5) = 18