If x = 10, a = 2 & b = 3, then:
102 + 103 = 100 + 1,000 = 1,100
ln(102 + 103)/ln(10) = log(1,100) = 3.041392685...
y = 3.041392685...
P.S.: ln(xa + xb)/ln(x) can also be simplified to logx(xa + xb)
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