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pandadude123
18.09.2019 •
Mathematics
What is the sum of the arithmetic series below?
15
e fn=4i-1
i=1
a. 930
b. 868
c. 434
d. 465
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Ответ:
Use formula for sum of an AP series
S = (n * (2a + (n - 1)d)) / 2
n -> no of terms in AP series , so n = 15
a -> first term in series, so a = 3
d -> common difference, so d = 4
Put all values for a, n, d and you will get the sum.
Ответ:
i dunno but u could click the help button right below it
Step-by-step explanation: