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trisngle2565
08.07.2019 •
Mathematics
The population of a local species of dragonfly can be found using an infinite geometric series where a1 = 30 and the common ratio is two fifths. write the sum in sigma notation and calculate the sum that will be the upper limit of this population.
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Ответ:
The answer is the summation of 30 times two fifth of the i minus 1 power from equation equals to 1, the sum is 50.
Explanation:
S = a ÷ (1-r)
S = 30 ÷ (1- (2÷5))
S = 50.
The sum is 50.
By sigma notation verifies 30.
Ответ:
Step-by-step explanation:
y = a * x(x - 3)(x + 1)^2
2,12 is used to find the value of a
y = a (2)(2 - 3)(2 + 1)^2
12 = a (2)(-1)(3)^2
12 = a (2) (-1) (9)
12 = - 18*a
12/-18 = a
a = - 2/3
y = (-2/3)*x*(x - 3)(x + 1)^2