What s the sum of all numbers less than 10,000 - id100003972438, paulesparsa6

Ответ:

snikergrace

11.01.2022

It has a factor of 2*3*5=30
what is the biggest number that is a multipule of 30

hmm
9000
9900
9990 is the biggest
30*333=9990
the summation of an arithetic sequence where first term is a1 and last is an and the number of terms is n
$s= \frac{n(a1+an)}{2}$

30 *2=60
that's 2 terms
30*3=90
30,60,90
3 terms

so 30*n means n terms
9990=30*333 means 333 terms

n=333
a1=30
an=9990
$s= \frac{333(30+9990)}{2}$
$s= \frac{333(10020)}{2}$
$s= \frac{3336660}{2}$
s=1668330

answer is 1,668,330

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Ответ:

ladybugys

10.07.2021

Mathematics

$x^2+3x-4=6\\x^2+3x-10=0\\x^2-2x+5x-10=0\\x(x-2)+5(x-2)=0\\(x+5)(x-2)=0\\x=-5 \vee x=2$

Do you mind if you guys me with this question i’m on number 8

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What's the sum of all numbers less than 10,000 that are divisible by 2, 3, and 5? ?

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