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Lady_Fox [76]
3 years ago
8

Confused on what to do

Mathematics
1 answer:
docker41 [41]3 years ago
7 0

Answer:

A

Step-by-step explanation:

Sorry if I am wrong

it is kinda confusing

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abruzzese [7]

Answer:

y = -2x + 2 i think

Step-by-step explanation:

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During it's first 50 days of growth a sunflower grows about 4 cm a day. Using this rate how many days will it take for the sunfl
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The answer is 15 days because
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Prove by mathematical induction that 1+2+3+...+n= n(n+1)/2 please can someone help me with this ASAP. Thanks​
Iteru [2.4K]

Let

P(n):\ 1+2+\ldots+n = \dfrac{n(n+1)}{2}

In order to prove this by induction, we first need to prove the base case, i.e. prove that P(1) is true:

P(1):\ 1 = \dfrac{1\cdot 2}{2}=1

So, the base case is ok. Now, we need to assume P(n) and prove P(n+1).

P(n+1) states that

P(n+1):\ 1+2+\ldots+n+(n+1) = \dfrac{(n+1)(n+2)}{2}=\dfrac{n^2+3n+2}{2}

Since we're assuming P(n), we can substitute the sum of the first n terms with their expression:

\underbrace{1+2+\ldots+n}_{P(n)}+n+1 = \dfrac{n(n+1)}{2}+n+1=\dfrac{n(n+1)+2n+2}{2}=\dfrac{n^2+3n+2}{2}

Which terminates the proof, since we showed that

P(n+1):\ 1+2+\ldots+n+(n+1) =\dfrac{n^2+3n+2}{2}

as required

4 0
3 years ago
Heeelp will give brainliest
ozzi

Answer:

42*7

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Solve the equation -2( 1 - 5v)
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it equals to -2+10v since you have to distribute the -2 to the 1 and -5v

8 0
3 years ago
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