(Q68).Evaluate each of the following in terms of x and y.

(iii) log260

X = log23

Y = log25

log2 60 = log2( × × )

= log2( × ) + log2

= log2 + log2 + log2 2

= log2 + log2 + 2(log2 )

= + + 2()

= + +