Question

if xa is a factor of x⁴-2x³-ax-1 then the value of a is ?​

Answer 1

Step-by-step explanation:

f(x)=(x−2)g(x)

Where(x−2)g(x)=x4–2x3+ax−1

Forx=2,

f(2)=(2–2)g(2)=0

or,24–2×23+a×2−1=0

or,a×2–1=0

So,a=1/2