375 = 3*5^3
Assuming you meant to ask for log 375,
log 375 = log 3 + 3 log 5 = a+3b
or, if you actually wrote what was intended,
375 = 4^a * 4^3b = 4^(a+3b)
given that log(4) 3 = a and log(4) 5 = b ,express 375 in terms of a and/or b .
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