Geometric Sequence

Algebra Level 3

Suppose that all the terms of the geometric sequence {an}\{ a_n\} are positive. If a1a2=a10a_1a_2=a_{10} and a1+a9=20, a_1+a_9 =20, what is the value of (a1+a3+a5+a7+a9)(a1a3+a5a7+a9)?(a_1+a_3+a_5+a_7+a_9)(a_1-a_3+a_5-a_7+a_9)?

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