Before the beginning

Level 1

We saw in Part 1 what was the beginning, now we have to ask ourself " Is there something before the beginning ? "!

x , 1 , 5 , 25 , 125... x\quad ,\quad 1\quad ,\quad 5\quad ,\quad 25\quad ,\quad 125...

-1 0.2 There's nothing before the beginning 0

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3 solutions

Abda Ji-a
Sep 13, 2015

You can use this formula :

5 n 5^n

Now we can apply the formula

5 1 5 0 5 1 5 2 5 3 0.2 1 5 25 125 { 5 }^{ -1 }\qquad { 5 }^{ 0 }\qquad { 5 }^{ 1 }\qquad { 5 }^{ 2 }\qquad { 5 }^{ 3 }\\ \downarrow \qquad \quad \downarrow \qquad \downarrow \qquad \quad \downarrow \qquad \downarrow \\ 0.2\qquad 1\qquad 5\qquad \quad 25\qquad 125

Nadri Pratama
Sep 13, 2015

x=5^-1 = 1/5=0.2

The rule is (from left to right) multiply th number by 5 to get the next number

So from right to left it will be divide by 5

1÷5=0.2

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