Q: What is the rule for 1 2 4?

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i0 = 4; in = in-1 - 3

1254

It is called equivalent fractions 1\2 1/4 1/8

add 4 to every other number 1(+4)=5, 5(+4)=9 2(+4)=6

The vector (6, -2)T

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2 squared 1 = 4 so the divisibility rule is that it is divisible by 1, 2 and 4.

There are infinitely many possible answers: Rule I: Output = 4 (whatever the input, the output is 4). Rule 2: Output = Input - 2 Rule 3: Output = Input/2 + 1 Rule 4: Output = (Input/3)2

0.5 = 1/2 and 0.25 = 1/4 1/2 divided by 1/4 is changed to 1/2 multiplied 4/1 which is 2 This rule applies when dividing a fraction by a fraction.

the rule is plus 2 1/3

There are infinitely many possible answers. Rule 1: Add 9 to Input Rule 2: Add 5 to 2*Input Rule 3: Add 1 to 3*Input Rule 4: Subtract -3 from 4*Input or, moving away from whole numbers, Add 3.8 to 2.3 times Input.

n2 - 1(4)2 - 116 - 1= 15====

one rule would be an+1 = an + 4 ; a0= 4. This gives 4,8,12,16,20,..... This is called an arithmetic sequence. A geometric rule would be an+1 = 2an; a0= 4. This gives 4,8,16,32,64,... Another rule is an+1 = an/2 + 6 ; a0= 4. This gives 4, 8, 10, 11, 11.5,11.75, ....

Add the increasing numbers by one - as in 0 1 2 3 4 5 6 etc 1 + 0 = 1 1 + 1 = 2 2 + 2 = 4 4 + 3 = 7 7 + 4 = 11 11 + 5 = 16 16 + 6 = 22

Divide by 2 to get the next term.

If you mean -4+20+1+4-20-1 = 0 because the numbers cancel themselves out

t(n) = (n+1)2 where n = 1, 2, 3, ...

rule 1: keep quiet rule 2: catch a fish rule 3: put the fish back rule 4: leave it's pointless