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b.²log75=³log75/³log2=2b+a/1/a=2ab+a²
²log 15 = ²log (3 x 5)
= ²log 3 + ²log 5
= ² log 3 + ² log 3. ³ log 5
= a + ab
No. B
²log 75 = ²log (3 x 25)
= ² log 3 + ² log 25
= ² log 3 + ² log 5²
= ² log 3 + 2. ² log 5
= ² log 3 + 2(² log 3. ³ log 5)
= a + 2ab