+0  
 
+2
49
4
avatar+149 

https://vle.mathswatch.co.uk/images/questions/question2801.png

 

smileysmileysmiley

qualitystreet  Feb 13, 2018
Sort: 

4+0 Answers

 #1
avatar+333 
+2

(i) n(n-1)

    If n-1 is odd, then n is even. 
    n(n-1) is the product of an even number and an odd number, so the product is even.

 

(ii) 2n=2*n Multiplying any whole number by 2 gives an even number, so 2n is an even number. So 2n+1=even number +1=odd number 2n+1 must always be an odd number.

 

 

 

winkwinkwink

lynx7  Feb 13, 2018
edited by lynx7  Feb 13, 2018
edited by lynx7  Feb 13, 2018
 #4
avatar+149 
+1

thanks for helping.

 

smileysmileysmiley

qualitystreet  Feb 14, 2018
 #2
avatar+91797 
0

This was an easy to type qeustion

SO

Next time could you please just type it in!

Melody  Feb 14, 2018
 #3
avatar+149 
+2

sure.

 

smileysmileysmiley

qualitystreet  Feb 14, 2018

6 Online Users

avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details