Prove
Asked by
| 25th Aug, 2008,
12:18: PM
Expert Answer:
we know that 1+w+w2=0 and w3=1
so using these subsitute 1+w=-w2 and 1+w2=-w in L.H.S.
L.H.S.=(-w2-2w2)4+(-4w+w)4 = (-3w2)4 + (-3w)4 = 81(w8 + w4) = 81(w2+w) =81(-1)= -81
Answered by
| 25th Aug, 2008,
07:10: PM
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