Wyznacz współczynnik a wielomianu w, jeśli w(-2) = 3 a) w(x) = x^3 +ax^2 -2x +5 b) w(x) = ax^4 -x^2 -1
w(-2)=3
a)
(-2)³+a(-2)²-2*(-2)+5 = 3
-8 + 4a +4+5= 3
4a = 3-1
4a=2
a=1/2
b)
a(-2)⁴ - (-2)² - 1 = 3
16a -4-1=3
16a = 3+5
16a=8
a=8/16
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w(-2)=3
a)
(-2)³+a(-2)²-2*(-2)+5 = 3
-8 + 4a +4+5= 3
4a = 3-1
4a=2
a=1/2
b)
a(-2)⁴ - (-2)² - 1 = 3
16a -4-1=3
16a = 3+5
16a=8
a=8/16
a=1/2