2^1999=(2^2000)/2
5^2001=(5^2000)*5
lhs={(2*5)^2000}*5/2
(10^2000)*2.5
{(10^2)^1000}*2.5
(100^1000)*2.5
Type: Posts; User: rahul14904; Keyword(s):
2^1999=(2^2000)/2
5^2001=(5^2000)*5
lhs={(2*5)^2000}*5/2
(10^2000)*2.5
{(10^2)^1000}*2.5
(100^1000)*2.5
2^1999=(2^2000)/2
5^2001=(5^2000)*5
lhs={(2*5)^2000}*5/2=(10^2)^1000*2.5=(100^1000)*2.5=(1 followed by 20 zeroes)*2.5=25 followed by 19 zeroes=>this gives sum of digits=2+5=7