Q.
Let p,q be integers and let α,β be the roots of the equation, x2−x−1=0, where α≠β .For n=0,1,2,… , let an=pαn+qβn . FACT: If a and b are rational numbers and a+b5=0, then a=0=b If a4=28, then p+2q=a12=
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a
12
b
21
c
14
d
7
e
a11+2a10
f
a11+a10
g
a11−a10
h
2a11+a10
answer is