解
设等比数列的公比为q
则a1=1 a10=2
2=q^9
q=2^(1/9)
a2*a3*a4*a5*a6*a7
=(a1^6)*q(1+2+3+4+5+6)
=(1^6)*[2^(1/9)]^21
=2^(21/9)
=2^(7/3)