Sequences and Series · Mathematics · MHT CET

If $$x, y, z$$ are in A.P. and $$\tan ^{-1} x, \tan ^{-1} y$$ and $$\tan ^{-1} z$$ are also in A.P., then

If for an arithmetic progression, 9 times nineth term is equal to 13 times thirteenth term, then value of twenty second term is

If $\sum_{r=1}^n(2 r+1)=440$, then $n=$ ...............

If the sum of an infinite GP be 9 and sum of first two terms be 5 then their common ratio is ..........

For a GP, if $S_n=\frac{4^n-3^n}{3^n}$, then $t_2=$ ...........

For a GP, if $(m+n)^{\text {th }}$ term is $p$ and $(m-n)^{\mathrm{th}}$ term is $q$, then $m^{\text {th }}$ term is ......