Question

prove that expression y ( y +1) always represent an even number where y is any positive integer

step by step please​

Answer 1

Step-by-step explanation:

let, y=1

1(1+1)=2*1=2

let,y=2

2(2+1)=3*2=6

let,y=3

3(3+1)=4*3=12

let,y=4

4(4+1)=5*4=20

and it goes on

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