Question

plz help me to solve this log sum

Answer 1

Here,
log{ x base 10 } = a
x = 10^a ---(1)

log{ y base 10 } = b
y = 10^b -----(2)

multiply eqns (1) and (2)
xy = 10^a.10^b = 10^(a + b)
xy = 10^(a + b)