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