2 years ago

Find c , if c = a + b

Mathematics

1 answer:

Mandarinka [93]2 years ago

7 0

Uh what’s a and b ??

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Hello,

Reminders:
$$\sum_{i=1}^{n} i= \dfrac{n(n+1)}{2}$


$
$$ \sum_{i=1}^{n} i^2= \dfrac{n(n+1)}{2}$

$
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$n=6\\
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$
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