Question

log2,5 9 * log9 4 = ?????????

Answer 1

log2.5  9 *log9  4=log4  2.5/log 4  9    *log4 4/log4  9=l0g4 2.5=log2.5  2/5/log 2.5 4=log2.5 2/2log2.5 2=1/2=0.5