I am confused over how I should even start this problem

Let n be an integer greater than 1, show that (1+x)^n > 1+nx for all x between (-1,0)

Printable View

- Oct 15th 2009, 12:20 PMadamantineBinomial proof?
I am confused over how I should even start this problem

Let n be an integer greater than 1, show that (1+x)^n > 1+nx for all x between (-1,0) - Oct 15th 2009, 01:26 PMhellohollar
Guessing here but if n has to be integer greater than 1 the, greatest it can be is 2. and since x can't be greater than -1 but less than 0 then 0< 1 + x<1, and since n is postive (1 +x)< (1+x)^n all the time. Now for 1+nx, we know n has to be greater than 1 and a integer therefore it always increases the value of x(which is a -negative) which 1 + nx < 1, and we knwo that (1 + x) < 1, therefore (1 +n)^n must be atleast equal if not greater than 1, threfore (1 +x)^n>1+nx. I know it is a really bad explanation and might be wrong but it is something