Teaching HTET PGT Level 3 - 2024 Mock Test Mathematics Relations and Functions Special Functions

If x = log_c (ab), y = log_a (bc), z = log_b (ca), then which of the following is correct?

1

xyz = 1

2

x + y + z = 1

3

(1 + x)^-1 + (1 + y)^-1 + (1 + z)^-1 = 1

4

(1 + x)^-2 + (1 + y)^-2 + (1 + z)^-2 = 1

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