Question

In which step did Rena make the first error?

Answer 1

Answer: step 4

!!

Explanation:

Answer 2

Answer: Step 4

Explanation:

Rena made the first mistake in step 4 because she left the terms
`2^(3) and (-1)^(21)` in the denominator, when in the previous step they were also in the denominator but raised to -1, which means that they should be in the numerator.

The right step 4 would be:

`(2^(3) (-1)^(21) )/(2^(6) ) =(-1)/(2^(3) ) =(-1)/(8)`