diketahui suku banyak f(x) = x^4 - cx^2 - 5. jika f(2) = 3, maka nilai f(1) =

pertama cari dulu nilai C

f(x) = x^4 - cx² - 5
3 = 2^4 - c(2²) - 5
3 = 16 - 4c -5
3 = -4c + 11
3-11 = -4c
-8 = -4c
c = 2

f(x) = x^4 - 2x² - 5
f(1) = 1^4 -2(1²)-5
f(1) = 1-2-5
f(1) = -6