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Janhabi Bauri

1 month before

math problem class XI

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how to solve it


Amrita Roy

1 month before

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Hi Janhabi, Let me give you a hint for this sum. It is very similar to the sums you have done in G.P. We just need an additional step in the beginning. Try to work out the rest of it. If you face any doubt, let me know.
Janhabi Bauri

1 month before

okay sir I understand now
Janhabi Bauri

1 month before

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please check it if I did any mistake..
Rittika Bose

1 month before

The solution looks fine.I hope you are clear with the additional step now. But sometimes, to twist the question even further, the number of observations is changed. E.g., the number of values of the variable can be n-1 or n+1 etc. instead of n. Consequently, you will divide the sum up to n-1 or n+1 terms by n-1 or n+1 respectively. So be careful about that as well.
Janhabi Bauri

1 month before

okay 😊