Feel free to answer any of the following questions! 1) The recursive formula for a sequence is f(n) = f(n – 1) + 12, where f(n) is the nth term of the sequence and f(1) = 19. Write an explicit formula that can be used to determine the nth term of the sequence
2) The recursive formula to describe a sequence is a^1=3 and a^n=1+2a^n-1. State the first four terms of this sequence.
3) Can the sequence a^1=3 and a^n=1+2a^n-1 be represented using an explicit geometric formula? Justify your answer.
4) Consider the series described as: -10 + -6 + -2 + … + 78 + 82 Is this series arithmetic or geometric? Justify your answer.
5) Consider the series described as: -10 + -6 + -2 + … + 78 + 82 Find the sum of the twenty-four terms in the series.

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step-by-step explanation:

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.

answer: the answer is one

step-by-step explanation:

pemdas, in this situation there is no parenthesis or exponents so you go to multiplication, 1x1=1, then division 1/1= 1 then addition 1+1=2 then subtraction 2-1=1