legacieenglish
03.08.2019 •
Mathematics
The first term of an arithmetic sequence is 14. the 25th term is 206. find the common difference
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Ответ:
Let's look at where is the term, is the first term, is the number of terms, and is the common difference. We already know that is equal to , is equal to , and is equal to . This therefore leave us with only the common difference to solve.
Manipulating the formula we can arrive at the
ANSWER: The common difference is 8.
Ответ:
6400
Step-by-step explanation:
Given the profit function ;
P(c) = –20c2 + 320c + 5,120
The maximum value is given by :
f(h) ; where, h = - b /2a
From P(C) ; a = - 20 ; b = 320
h = - b / 2a = - 320 / 2(-20) = - 320 / 40 = 8
c = h
P(8) = –20(8)² + 320(8) + 5,120
P(8) = - 1280 + 2560 + 5120
= 6400