- 0
- 1
- abcd
- ab/cd
- cd/ab

Option 2 : 1

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LIC AAO Prelims 4 May 2019 Shift 1 Memory Based Paper

27032

100 Questions
70 Marks
60 Mins

a/b = c/d

Leta/b = c/d = k

a = bk and c = dk

\(\frac{{4a - 5b}}{{4a + 5b}} \times \frac{{4c + 5d}}{{4c - 5d}} = \frac{{4bk - 5b}}{{4bk + 5b}} \times \frac{{4dk + 5d}}{{4dk - 5d}} = \left( {\frac{{4k - 5}}{{4k + 5}}} \right) \times \left( {\frac{{4k + 5}}{{4k - 5}}} \right) = 1\)
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