# How do you find the sum of the arithmetic series #Sigma(5t-3)# from t=19 to 23?

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- #a# i s The arithmetic mean of two positive numbers #b and c# . #G_1# and #G_2# are the geometric mean between the same positive numbers #b and c# so prove that #G_1^3+G_2^3#=#2abc# ?
- Given an arithmetic progression with a20 =70 and s20=640 find the first term and the common difference ?
- What is the 8th term of the geometric sequence if #a_3 = 108# and #a_5 = 972#?
- What is the sum of the geometric sequence 2, 10, 50, … if there are 8 terms?
- How to answer these using geometric progression formula ?

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