Jawabanmu

2014-05-31T08:33:42+07:00
f(x) = 2x^4 + ax^3 - 3x^2 + 5x + b
f(1) = 2 + a - 3 + 5 + b = 11 atau a +b = 7
f(-1) = 2 - a - 3 - 5 + b = -1 atau -a + b = 5
maka a = 1 dan b = 6
ab = 1.6 = 6
itu yg b = 11 dr mana ya?
6x + 5 masukkan x = 1 maka 6(1) + 5 = 11
okeey thankyou