Let (2x2+3x+4)10=r=0∑20arxr, then the value of a13a7 is
then show that
If pandq are ositive, then prove that the coefficients of xpandxq in the expansion of (1+x)p+q will be equal.
Let n be an odd natural number greater than 1. Then , find the number of zeros at the end of the sum 99n+1.
Show that the middle term in the expansion of (1+x)2nisn!(1.3.5(2n−1))2nxn,wheren is a positive integer.