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Nana76 [90]
3 years ago
14

Finding the sum. imaginary numbers! hellpp

Mathematics
1 answer:
Neko [114]3 years ago
3 0
The "i" in this problem actually doesn't represent imaginary numbers. This is a summation problem which is asking for the sum of (2i+1) for when i = 1 to i = 7.

So (2(1) + 1) + (2(2) + 1) + (2(3) + 1) + (2(4) + 1)... etc...

The summation rules we need to know for this problem are for constants and for a single variable.

When we have a constant, the summation rule is n*c where n is the number of times.

When we have a single variable, the summation rule is n(n+1)/2.

So applying the summation rules where n = 7:

2(7)(7+1)/2 + 1(7)

(7)(8) + 7 = 63

The answer to the summation is 63.
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3 years ago
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5 0
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Read 2 more answers
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Tju [1.3M]
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5 0
3 years ago
Please help!!! I don’t get any of this can someone please explain what to do and how I can get my answer????
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2. d = rt
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    sub
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   d = 196 <==

3. A = L * W
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4. A = L * W
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u basically do the same for all the others....its just a matter of subbing and solving
  
    
7 0
3 years ago
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