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Semenov [28]
3 years ago
13

Use the arithmetic progression formula to find the sum of integers from 75 to 100.75,76,77....99,100.​

Mathematics
1 answer:
Sophie [7]3 years ago
5 0

Answer:

The sum is 2275

Step-by-step explanation:

Given

75,76,77....99,100

Required

The sum

Using arithmetic progression, we have:

S_n = \frac{n}{2}(T_1 + T_n)

Where:

T_1 = 75 --- first term

T_n = 100 --- last term

n = T_n - T_1 + 1

n = 100 - 75 + 1 = 26

So, we have:

S_n = \frac{n}{2}(T_1 + T_n)

S_n = \frac{26}{2}*(75 + 100)

S_n = 13*175

S_n = 2275

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