Let the intersection coordinates of the image with the function y = 1 / X and y = X-1 be (a, b), then the value of 1 / a minus 1 / B is (a, b)

Let the intersection coordinates of the image with the function y = 1 / X and y = X-1 be (a, b), then the value of 1 / a minus 1 / B is (a, b)

The intersection of y = 1 / X and y = X-1 in (a, b)
1/x = x-1
Substituting x = a into 1 / x = X-1:
1/a = a-1
Substituting x = a, y = B into y = 1 / X:
b=1/a
1/b=a
1/a - 1/b = (a-1) - a = a-1-a = -1