Question

question is in attachment

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Answer 1

Answer is option A

thank you

Answer 2

Answer

(1-1/2)(1-1/3)(1-1/4).... (1-1/n+1)


p=( 1-1/2)(1-1/3)(1-1/4)....(1-1/n)(1-1/n+1)

(2-1/2)(3-1/3)(4-1/4)....(n-1/n)(n+1-1/n)

1/2*2/3*3/4...n-1/n*n/n+1

= 1/n+1

Hence

answer is option no A

Thanks