Question

Tlong bantuannya. terima kasih

Answer 1

(1/(1+p))^5 . (1/(1-p))^(-7) . [(1-p)/(1+p)]^(-6)
= (1 + p)^(-5) . (1 - p)^7 . (1 - p)^(-6) . (1 + p)^6
= (1 + p)^(-5 + 6) . (1 - p)^(7 + (-6))
= (1 + p)(1 - p)
= 1 - p^2