a_(n)=n(n^(2)+5)/(4)

If a_(n)=(n^(2))/(3n+2) , find a_(1)a_(5) .

If (1+x+x^(2))^(n)=1 +a_(1)x+a_(2)x^(2)+a_(3)x^(3) +……..+a_(2n).x^(2n) then prove that: (i) a_(1)+a_(3)+a_(5)+…..+a_(2n-1) =(3^(n)-1)/(2) (ii) a_(2)+a_(4)+a_(6)+……+a_(2n)=(3^(n)-1)/(2)

Find the indicated terms in each of the following sequences whose nth terms are: a_(n)=5_(n)-4;a_(12) and a_(15)a_(n)=(3n-2)/(4n+5);a+7 and a_(8)a_(n)=n(n-1);a_(5)anda_(8)a_(n)=(n-1)(2-n)3+n);a_(1),a_(2),a_(3)a_(n)=(-1)^(n)n;a_(3),a_(5),a_(8)

In an AP a_(n) = (5n-3)/(4) , then a_(7) = ………..

Find the next five terms of each of the following sequences given by: a_(1)=1,a_(n)=a_(n-1)+2,n>=2a_(1)=a_(2)=2,a_(n)=a_(n-1)-3,n>2a_(1)=-1,a_(n)=(a_(n-1))/(n),n>=2a_(1)=4,a_(n)=4a_(n-1)+3,n>1

Write the first five terms of each of the following sequences whose n th terms are: a_(n)=3n+2( ii) a_(n)=(n-2)/(3)a_(n)=3^(n)( iv )a_(n)=(3n-2)/(5)a_(n)=(-1)^(n)*2^(n)( vi) a_(n)=(n(n-2))/(2)a_(n)=n^(2)-n+1 (vii) a_(n)=2n^(2)-3n+1a_(n)=(2n-3)/(6)

Write first 4 terms in each of the sequences : (i) a_(n) = (5n+2) (ii) a_(n) = (( 2n -3))/4 (iii) a_(n)= (-1)^(n-1) xx 2 ^(n +1)

a_(n) = 2^(n), a_(5) = ………