Question

show that number of form 4m, 4m+2 can't be prime ​

Answer 1

Answer:

4m

let m = 0 , 1, 2, ......

put m= 0 = 0

m = 1 = 4

m = 2 = 4×2 =8......

Therefore 4m is an even number

4m +2

let m = 0, 1 , 2, ....

put m= 0 = 0 +2 = 2 if m belongs to whole number

m = 1 = 4+2 =6.....

Therefore 4m + 2 is an even number

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