Diketahiu suku banyak f(x)=3x⁶-13x³+2x²-2a agar f(2)=88 , maka nilai a adalah ...

f(x) = 3[tex] x^{6} [/tex] - 13[tex] x^{3} [/tex] + 2[tex] x^{2} [/tex] - 2a
f(2) = 88
x = 2. Jadi...
88 = 3 x [tex] 2^{6} [/tex] - 13[tex] 2^{3} [/tex] + 2[tex] 2^{2} [/tex] - 2a
88 = 192 - 104 + 8 - 2a
88 = 80 - 2a
-2a = 8
a = -4

f(2) = 3.2 - 13 (2)^3 + 2 (2)^2 - 2a = 88
= 6 - 13.8 + 2.4 - 2a = 88
= 6 - 104 + 8 - 2a = 88
= 2a = 88 + 90
2a = 178
a = 89