5^a=8,5^b=4,则5^3a+2a=?,25^a+b=?

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5^a=8,5^b=4,则5^3a+2a=?,25^a+b=?

5^a=8,5^b=4,则5^3a+2a=?,25^a+b=?
5^a=8,5^b=4,则5^3a+2a=?,25^a+b=?

5^a=8,5^b=4,则5^3a+2a=?,25^a+b=?
5^3a+2b
=(5^3a)(5^2b)
=[(5^a)^3][(5^b)^2
=8³×4²
=8212
25^a+b
=(5²)^(a+b)
=5^2a×5^2b
=8²×4²
=1024