The manager of a softball team needs to prepare a batting lineup using her 9 starting players. How many different lineups can sh
1 answer:
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Answer:
Step-by-step explanation:
The sum you are trying to understand is this.
Remember that in general when you have a geometric series
you have that
and that equality is true as long as
.
Therefore here we have
and
Therefore we can use the formula and
Answer:
(or 6.25)
Step-by-step explanation:
Let's do a simple square problem to see the relationship between the elements of the resulting equation...
As you see, the number of 'x' (6) is the double of the numeric part of the binomial expression (3), while the numeric-only part (9) is the square of the numeric part of the binomial expression (3).
So, if we look at the formula from the problem, we see the the number of 'x' is 5. To obtain the C value, we need to divide the 5 by 2... then get the square value of the result.
(or 6.25)