What is the value of the following expression?
122-1 + 142-1 + 162-1 + ... + 1202-1
Explanation:
122-1+142-1+162-1+...+1202-1
=11×3+13×5+15×7+...+119×21
=121-13+13-15+15-17...+119-121
=121-121=122021=1021
Hence, option (c).
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