Q [780/780]
jika '&' adalah perkalian suatu bilangan,
[tex]f(x) = {x}^{2} + 2x - 7[/tex]
=> maka nilai f(4) & f(8) = ?
*wajib menggunakan cara!*
tidak pakai cara otw report:)![]()
jika '&' adalah perkalian suatu bilangan,
[tex]f(x) = {x}^{2} + 2x - 7[/tex]
=> maka nilai f(4) & f(8) = ?
*wajib menggunakan cara!*
tidak pakai cara otw report:)
Jawaban:
[tex]f(x) = {x}^{2} + 2x - 7[/tex]
=> maka nilai f(4) & f(8) = ?
penyelesaian :
f(4) = 4^2 + 2(4) - 7
f(4) = (4 × 4) + (2 × 4) - 7
f(4) = 16 + 8 - 7
f(4) = 24 - 7
f(4) = 17
______
f(8) = 8^2 + 2(8) - 7
f(8) = 64 + 16 - 7
f(8) = 80 - 7
f(8) = 73
maka :
"&" = perkalian (×)
f(4) & f(8)
f(4) × f(8)
17 × 73
= 1.241
f(x) = x² + 2x - 7
[tex]~[/tex]
Maka,
f(4) = 4² + 2(4) - 7
f(4) = 16 + 8 - 7
f(4) = 16 + 1
f(4) = 17
...
f(8) = 8² + 2(8) - 7
f(8) = 64 + 16 - 7
f(8) = 80 - 7
f(8) = 73
...
maka,
f(4) & f(8)
= 17 × 73
= 1.241
[answer.2.content]
