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thanks

**{7/3}**- Replies: 6

if P is the set of primes then is |P| = |N| true?

Ebenezerson I think u are posting wrong question

hi ebnezerson

welcome to the forum

I want a proof that b for every positive b and n there is a real number x such that b^x=n

sorry forgot to say positive

**{7/3}**- Replies: 4

prove that if r is real,then log r is real.

my old textbook says gcd(a/b,c/d) = gcd(a,c)/lcm(b,d)

i think it's brother

Al-Allo wrote:

Ah ok, but parallely, if I said :

I'm not sure about it, but could we say that the common factor of these two is 7 ??? Or I'm totally wrong ?

hi al-allo first number is divisible by 1/7 and the second one by 7

yeah

thanks.

**{7/3}**- Replies: 4

I can't see any way to solve this

prove,a+bi=c+di implies a=b and c=d

hi bit-eater

welcome to the forum

Agnishom wrote:

Okay, but how many of them apply to you

only 3

I have to do all that to become a mathematician! It's easier to think that i am a mathematician.

Sorry,i mixed up locus and envelope.

Not sure,but won't the locus be a segment of a parabola?

now,a^2<a^2+b^2 [equal in case of b=0] taking positive square root |a|<abs(z),by the inequality law of absoloute value,-abs(z)<a<abs(z)

Lol...:D

Hi bronxsystem

welcome to the forum

Turn the summation to this

then divide it by you can then prove it.Okay,what about tautology?and contradiction in proofs is only used in the form -p and (not p)