SOLUTION: find the mean of the 15 th through 55 th terms inclusive of the sequence:
a billow n = 7 - 4n please i need help to solve any one please help.....
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a billow n = 7 - 4n please i need help to solve any one please help.....
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Question 195832: find the mean of the 15 th through 55 th terms inclusive of the sequence:
a billow n = 7 - 4n please i need help to solve any one please help..... Answer by RAY100(1637) (Show Source):
You can put this solution on YOUR website! a(n) = 7-4n
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The form is that of an arithmetic series, a(n) = a(1) +(n-1)d
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a(15) = 7-4(15) = -53
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a(55) = 7-4(55) = -213
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Mean is average in arithmetic series
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mean = - (213 +53) /2 = -133
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