已知lna+lnb=2ln(a-2b),求log√2^(b/a)

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已知lna+lnb=2ln(a-2b),求log√2^(b/a)已知lna+lnb=2ln(a-2b),求log√2^(b/a)已知lna+lnb=2ln(a-2b),求log√2^(b/a)lnab

已知lna+lnb=2ln(a-2b),求log√2^(b/a)
已知lna+lnb=2ln(a-2b),求log√2^(b/a)

已知lna+lnb=2ln(a-2b),求log√2^(b/a)
lnab=ln(a-2b)^2
a=4b,a=b(舍去,a-2b>0)
log√2^(1/4)= (log2)/8