a=log16(9)=(2ln3)/(4ln2) b=(ln5)/(ln18)=(ln5)/(2ln3+ln2)
log36(45)=(2ln3+ln5)/(2ln2+2ln3)
=1/(ln2/ln3+1) + [(ln5)/(2ln3+ln2)]/[(2ln2+2ln3)/(2ln3+ln2)]
=1/(2a+1)+b/[(2+2ln3/ln2)/(2ln3/ln2+1)]
=1/(2a+1)+b/[(2+4a)/(4a+1)]
=(2+b+4ab)/(2+4a)
a=log16(9)=(2ln3)/(4ln2) b=(ln5)/(ln18)=(ln5)/(2ln3+ln2)
log36(45)=(2ln3+ln5)/(2ln2+2ln3)
=1/(ln2/ln3+1) + [(ln5)/(2ln3+ln2)]/[(2ln2+2ln3)/(2ln3+ln2)]
=1/(2a+1)+b/[(2+2ln3/ln2)/(2ln3/ln2+1)]
=1/(2a+1)+b/[(2+4a)/(4a+1)]
=(2+b+4ab)/(2+4a)