" d the sum of two middle most terms of the "/_P-(4)/(3),-1,(-2)/(3),...,4=

Find the sum of two middle most terms of the AP -(4)/3,-1,-(2)/3,.....4(1)/3

Find the sum of two middle terms of the AP -(4)/(3),-1,-(2)/(3),-(1)/(3),...,4((1)/(3))

Find the sum of two middle terms of the AP -4/3,-1,-2/3,-1/3,...,4(1/3)

Find the sum to 81 terms of the AP-1, 1/4 , 3/2 ,……

Find the sum of: 24 terms and n terms of 2 (1)/(2) , 3 (1)/(3) , 4 (1)/(6) ,5 ,......,

Find the sum to n terms of the series (1.2.3) + (2.3.4) + (3.4.5) ...

Show that the coefficient of the middle term of (1+x)^(2m) is equal to the sum of the coefficents of the two middle terms of (1+x)^(2m-1) .

Show that coefficient of the middle term of (1+ x)^(2n) is equal to the sum of the coefficients of two middle terms of (1+x)^(2n-1) .