Question: For the sequence -20, -25, -30, -35, ... , -205 a) Determine a simplified expression for tn. b) Calculate the number of terms in the

For the sequence -20, -25, -30, -35, ... , -205

a) Determine a simplified expression for tn.

b) Calculate the number of terms in the following sequences.

c) Find the sum of all terms.

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