Algebra and Applications Test 2

Question : 1 of 40

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What is the value of

(1 + w ^{r-s} )^{ -1} + (1 + w^{s-r} )^{ -1}

Solution:

(1 + w ^{r-s} )^{ -1} + (1 + w^{s-r} )^{ -1}

⇒1/(1 + w ^{r-s} ) + w^{r-s}/ (1 + w^{r-s} ) =1

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