Question

Evaluate: [(1/2)-1+(1/3)-1+(1/4)-1]-1​

Answer 1

Answer:

1−12)(1−13)(1−14)(1−15)  

=(2−12)(3−13)(4−14)(5−15)

=1/2×2/3×3/4×4/5

For each fraction other than the last one, the denominator cancels with the numerator of the next fraction. So the product is just

                                                      1/5

Answer 2

Answer:

11/12

Steps are in the image