Question

4. If x= (-1)×(-1)×(-1)×(-1)…………. Up to 199 times and Y = (+1)×(-1)×(+1)×(-1)…….. up to 200 times then find the value of x-y .

Answer 1

Answer:

-2.

Step-by-step explanation:

x=(-1)×(-1) upto 199 times it is an odd number.

so,x=-1.

y=(-1)×(-1) upto 200 times it is an even number.

so,y=1

x-y= -1-1=-2.