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ANTONII [103]
3 years ago
6

What is the are of this triangle? How do you find the area if you don’t know the height to use A=1/2(b) x h

Mathematics
1 answer:
galina1969 [7]3 years ago
3 0

Answer:with that formula you need to change it to be equal to h so you can find it

Step-by-step explanation:

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How to do
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Use summation notation to write the series 49 + 54 + 59 +... for 14 terms.
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Answer:

Arithmetic sequence states that a sequence of numbers such that the difference between the consecutive terms is constant.

it is given by:  a_n = a+(n-1)d where a is the first term , n is the number of term and d is the common difference.

Given the series: 49 + 54 + 59+ ......

here, Common difference(d) = 5

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by definition we have;

For nth term

a_n = a+(n-1)d

a_n = 49+(n-1)5

a_n =49+5n -5 = 5n + 44

To write the series using summation notation for 14 terms

Summation symbol '\sum'

The series for 14th terms is given by;

\sum_{n=1}^{14}(5n +44)


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3 years ago
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