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Plz help me in finding 1•2+2•4+3•8+…n•2^n •=multiplication...:-)

Note by Prakher Gaushal 3 years, 5 months ago

Easy Math Editor

*italics*

_italics_

**bold**

__bold__

- bulleted- list

1. numbered2. list

paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)

> This is a quote

This is a quote

# I indented these lines # 4 spaces, and now they show # up as a code block. print "hello world"

2 \times 3

2^{34}

a_{i-1}

\frac{2}{3}

\sqrt{2}

\sum_{i=1}^3

\sin \theta

\boxed{123}

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Sorry ,but I didn't have the patience to write it down in \(|LaTeX\) but couldn't let your doubt unattended , sohere's my solution .

P.S. If you find any mistakes, just tell me . I wrote the solution in a hurry !!!

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Thanks

It think I told the same anyway nice to see your handwriting . Is this your backside of your project file?

Yeah, correctly guessed :)

Great.

Let me echo my comment in this note

\(\sum_{r=1}^{n} rx^r = \frac{x+(nx-n-1)x^{n+1}}{(x-1)^2}\)) is a useful formula to be aware of, to sum scenarios like this.

slide the series , and multiply it by 2 then take the difference , a g.p will be formed.next is easy

What is the sum for \( n = 1, 2, 3, 4, 5 \)?

Can't get what u want to say.....

Sir wants to say write the genral term for the series that is and then put corresponding values for n

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Easy Math Editor

`*italics*`

or`_italics_`

italics`**bold**`

or`__bold__`

boldNote: you must add a full line of space before and after lists for them to show up correctlyparagraph 1

paragraph 2

`[example link](https://brilliant.org)`

`> This is a quote`

Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.`2 \times 3`

`2^{34}`

`a_{i-1}`

`\frac{2}{3}`

`\sqrt{2}`

`\sum_{i=1}^3`

`\sin \theta`

`\boxed{123}`

## Comments

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TopNewestSorry ,but I didn't have the patience to write it down in \(|LaTeX\) but couldn't let your doubt unattended , sohere's my solution .

P.S. If you find any mistakes, just tell me . I wrote the solution in a hurry !!!

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Thanks

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It think I told the same anyway nice to see your handwriting . Is this your backside of your project file?

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Yeah, correctly guessed :)

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Great.

Let me echo my comment in this note

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slide the series , and multiply it by 2 then take the difference , a g.p will be formed.next is easy

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What is the sum for \( n = 1, 2, 3, 4, 5 \)?

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Can't get what u want to say.....

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Sir wants to say write the genral term for the series that is and then put corresponding values for n

Log in to reply