Prove that 6i50 + 5i33 – 2i15 + 6i48 = 7i.
Given: 6i50 + 5i33 – 2i15 + 6i48
To prove: 6i50 + 5i33 – 2i15 + 6i48 = 7i
6i4×12+2 + 5i4×8+1 – 2i4×3+3 + 6i4×12
6i2 + 5i1 – 2i3 + 6i0
-6+5i+2i+6
7i
Hence proved.