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uhhmm.. this is our assignment in number theory and i am having a hard time answering this. can someone please help me?
well, it is more on proving.
1. Show that if 2a+1 is a multiple of 5, then 14a^2 + 19a - 19 is a multiple of 25.
2. If a and b are odd integers, then 8 divides (a^2 - b^2).
3. Prove that if a divides b and a + b = c, then a divides c.
4. Prove that if a divides c and a + b = c , then a divides b.
5. If n is an odd integer, then 24 divides n (n^2 - 1).
to those who will help me answer this,, thank you thank you thank you!
can someone please answer this?
1. the square root of ( 4 - x ) plus the square root of ( x + 4 )
2. square root of x squared minus 2x minus 3 plus the square root of x minus 3.
3. square root of x squared minus 1, plus square root of ( x + 1 )
4. x squared minus 16 plus square root of (x + 16)
thanks in advance! mwah!
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