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# Does this work?(or did i do it wrong?)fp1 proof by induction

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1. n=1

n=k

n=k+1

since true for n=1 it's therefore true for n=2,3,4.....

also what does mean? it's looks really cool but i don't understand it
2. Yes, it looks right, watch out for bracketing errors.

This:

n=k+1

Should be this:

But other than that it's all right.
3. (Original post by huiop)

also what does mean? it's looks really cool but i don't understand it
means " n is an element of the set of positive integers"
4. (Original post by huiop)
Proof by induction...
Good (though that 2=2 is pointless). Just be careful of the brackets; I'm sure you got them in there correctly on the paper.

means belongs to the set of positive integers. Another indication could be where it means that is in the subset of natural numbers,
5. You must not write 2 = 2 that is not correct.

Write LHS = 2 RHS = 2 so true for n = 1.
6. Your proof needs to have some explanation too - also see my comment above.
For example,
'Assume true for some n = k'
7. (Original post by NotNotBatman)
Yes, it looks right, watch out for bracketing errors.

This:

n=k+1

Should be this:

But other than that it's all right.
oops, yes i was trying to correct them all before the replies came
(Original post by NotNotBatman)
means " n is an element of the set of positive integers"
???? i don't quite understand
(Original post by RDKGames)
Good (though that 2=2 is pointless). Just be careful of the brackets; I'm sure you got them in there correctly on the paper.

means belongs to the set of positive integers. Another indication could be where it means that is in the subset of natural numbers,
oops yea... corrected now...

so is it suppsoed to mean n is any positive number? i don't quite understand i know n by itself just means n, the e stands for any then the z i don't know what that is :/
(Original post by Muttley79)
You must not write 2 = 2 that is not correct.

Write LHS = 2 RHS = 2 so true for n = 1.
o.o
ok so that's a better way to express it?
(Original post by Muttley79)
Your proof needs to have some explanation too - also see my comment above.
For example,
'Assume true for some n = k'
ok thanks
8. (Original post by huiop)
oops yea... corrected now...

so is it suppsoed to mean n is any positive number? i don't quite understand i know n by itself just means n, the e stands for any then the z i don't know what that is :/
Top line of: http://www.math.ku.edu/~porter/Math_symbols%20.pdf

By saying you are restricting what types of values n can be. The Z gets rid off any fractions and irrationals, thus leaving positive/negative integers. By saying you are specifying it further down to only POSITIVE integers.
9. (Original post by RDKGames)
Top line of: http://www.math.ku.edu/~porter/Math_symbols%20.pdf

By saying you are restricting what types of values n can be. The Z gets rid off any fractions and irrationals, thus leaving positive/negative integers. By saying you are specifying it further down to only POSITIVE integers.
ooh ok so it means any positive integer thanks a ton

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