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samafeggins2
27.11.2019 •
Mathematics
What is the sum of all positive 1-digit integers that 4221462 is divisible by?
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Ответ:
n=4221462
n is divisible by 1 as any integer.
n ends by 2==>n is divisible by 2
4+2+2+1+4+6+2=21 is a multiple of 3 ==> n is divisible by 3
62 is not n is divisible by 4 and nor n.
n don't end with 0 or 5 ==>n is not divisible by 5
n is divisible by 2 and n is divisible by 3==n is divisible by 6
divisibility by 7:
1|231|231
4|221|462
(1*2+3*6+2*4 ) mod 7=(2+4+1) mod 7=0
1*4=4 0+4=4
(1*1+3*2+2*2) mod 7= (1+6+4) mod 7= 4
4-4=0 so n is divisible by 7
462 is not divisible by 8; nor n.
4+2+2+1+4+6+2=21 is not divisible by 9, nor n
==>1+2+3+6+7=19
Ответ:
The first equation is -8y
The second equation is -16.2h
Step-by-step explanation:
Hope that helps you out! :)