Prove that = 0.
Given:
To prove : = 0.
L.H.S.= i-1 – i-2 + i-3 – i-4
i-4×1+3 – i-4×1+2 + i-4×1+3 – i-4×1
since = 1
= i
= -1
So,
i1 – i2 + i3 – 1
i +1 – i -1
0
⇒L.H.S = R.H.S