Step-by-step explanation:
Sum of arithmetic terms = n/2 × [2a + (n - 1)×d], where 'a' is the first term, 'd' is the common difference between two numbers, and 'n' is the number of terms.
this is the same as n/2 × (a1 + an), because
an = a1 + (n-1)×d
so, for the series above :
a or a1 = 2
d = 7, as every new term is the previous term plus 7.
for n
37 = a1 + (n-1)×d = 2 + (n-1)×7
and now solve for n
35 = 7n - 7
42 = 7n
n = 6
so, the sum of all terms is
6/2 × (2+37) = 3×39 = 117
Answer:
Mean: 11.5 Median: 6
Step-by-step explanation:
For the mean find the average by adding all of the numbers up and dividing by the number of numbers in the set.
For the median arrange the numbers in order of least to greatest then find the middle number if there is two add them together and divide by two.
Answer:
3a
Step-by-step explanation:
The answer is 28.2 (or about 28). to find this, you do 23,572 / 837.
A₁ = 1 = 4⁰
a₂ = 4 =4¹
a₃ =4 x 4=4²
a₄ =4 x 4² =4³
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a(n) = 4⁽ⁿ⁻¹⁾
