The value of the expression 1 . Where is an imaginary cube root of unity, is |
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a) |
b) |
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c) |
d) |

The value of the expression 1 . Where is an imaginary cube root of unity, is |
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a) |
b) |
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c) |
d) |

1 Answer

127 votes

**(b)**

th term of the given series

Thus, sum of the give series

127 votes

127