Find n if `""^(n-1)P_(3) : ""^(n)P_(4)=1:9`.

Find 'n' if (""^(n)P_(4))/(""^(n-1)P_(4))= (5/3) ?

Find the value of n such that (""^(n)P_(4))/(""^(n-1)P_(4))=(5)/(3), n gt 4

Prove that 1* ""^(1)P_(1)+2* ""^(2)P_(2)+3* ""^(3)P_(3) + … +n* ""^(n)P_(n)=""^(n+1)P_(n+1)-1

Find the value of n such that ""^(n)P_(5)=42""^(n)P_(3), n gt 4

if .^(2n+1)P_(n-1):^(2n-1)P_(n)=7:10 , then .^(n)P_(3) equals

If ""^(n)P_(4) = 24^(n)C_(5) then the value of n=

if .^(m+n) P_(2)=56 and .^(m-n)P_(3)=24 , then (.^(m)P_(3))/(.^(n)P_(2)) equals

Prove that .^(n-1)C_(3)+.^(n-1)C_(4) gt .^(n)C_(3) if n gt 7 .

If .^(9)P_(5)+5 .^(9)P_(4)=.^(n)P_(r) then n+r equals

Consider a polygon of sides 'n' which satisfies the equation 3*^(n)P_(4)=^(n-1)P_(5) . Q. Number of quadrilaterals thatn can be formed using the vertices of a polygon of sides 'n' if exactly 1 side of the quadrilateral in common with side of the n-gon, is