Surds and Indices Practice Test 1

Question : 28 of 40

Marks: +1, -0

(64)^{-1/2}- (-32)^{-4/5} = ?

Solution:

(64)^{-1/2}- (-32)^{-4/5}

=(2^6)^{-1/2}- (-2^5)^{-4/5}

=2^{-3}-(-2)^{-4}

=1/8-1/(-2)^4

=1/8-1/16=1/16

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