Question

Dik : 3^log 2 = x, 2^log 5 =y nyatakan dlm x dan y dari 5^log 15

Answer 1

³log 2 = x
²log 3 =1/x
²log 5 = y

^5log 15
=²log 15 / ²log 5
=²log 3×5 / ²log 5
=(²log 3 + ²log 5) / ²log 5
=(1/x + y ) / y
=[(1+xy)/x] / y
=(1+xy) / xy