11 से 13 तक प्रत्येक अनुक्रम के पाँच पद लिखिए तथा संगत श्रेणी ज्ञात कीजिए :
`a_(1)=-1,a_(n)=(a_(n-1))/(n),` जहाँ `nge 2`

Write the first six terms of following sequence : a_(1)=-1,a_(n)=(a_(n-1))/n,(nge2) .

If a_(1)=-1 and a_(n)=(a_(n-1))/(n+2) then the value of a_(4) is ____.

Write the first five terms of each of the sequences in Questions 11 to 13 and obtain the corresponding series : a_(1)=-1, a_(n)=(a_(n-1))/(n),nge2

If quad 1,a_(1)=3 and a_(n)^(2)-a_(n-1)*a_(n+1)=(-1)^(n) Find a_(3).

If a_(1)=1anda_(n+1)=(4+3a_(n))/(3+2a_(n)),nge1 and if Lt_(ntooo)a_(n)=n then find a.

Find a_(1) and a_(9) if a_(n) is given by a_(n) = (n^(2))/(n+1)

Find a_(1) and a_(9) if a_(n) is given by a_(n) = (n^(2))/(n+1)

Write the first six terms of each of following sequences, (i) a_(1)=-1,a_(n)=(a_(n-1))/n,(nge2) (ii) a_(1)=4,a_(n+1)=2na_(n)

If a_(1)=2 and a_(n)-a_(n-1)=2n(n>=2), find the value of a_(1)+a_(2)+a_(3)+....+a_(20)