If `r^(th)`term in the expansion of `(x/3-2/x^2)^(10)`contains `x^4`, then find the value of r

if the rth term in the expansion of (x/3-2/(x^2))^(10) contains x^4 then r is equal to

if the rth term in the expansion of (x/3-2/(x^2))^(10) contains x^4 then r is equal to

If the rth term in the expansion of (x/3-2/x^2)^10 contains x^4 , then r is equal to ,

If the r^(th) term in the expansion of ((x)/(3)-(2)/(x^(2)))^(10) contains x^(4) , then r=

If the r^(th) term in the expansion of ((x)/(3)-(2)/(x^(2)))^(16) contains x^(4) , then r=

if the rth term in the expansion of ((x)/(3)-(2)/(x^(2)))^(10) contains x^(4) then r is equal to

If the binomial coefficient of the (2r+4)^(th) term and (r-2)^(th) term in the expansion of (1+x)^(18) are equal find the value of r.

If the rth term in the expansion of ((x^(3))/(3)-(2)/(x^(2)))^(10) contains x^(20) .then r=