mimithurmond03
08.01.2021 •
Mathematics
An equation is shown. What is the value of 12x that makes the equation true?
12x + 4x = 
+ 4x
12x =
Solved
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Ответ:
Ответ:
a = 4, d = 5 - 4 = 1, n = 150
Sn = n/2[2a + (n - 1)d]
S(150) = 150/2[2(4) + (150 - 1)1] = 75[8 + 149] = 75(157) = 11,775