Question

show that y-1 ia a factor of y ^20 -1 and y ^ 21​

Answer 1

Answer:

Step-by-step explanation:

according to the question y^20-1 can be written as y^20-1^20

so according to a formula x^n-y^n is always divisible by x-y if n is any +ve integer

so y^20-1 is always divisible by y-1