(adsbygoogle = window.adsbygoogle || []).push({}); 1. Find value of x if:

4^{x-1}= 1/32

3. I know that both 4 and 1/32 can be expressed as powers of 2 so (2^{2})^{x-1}= 2^{-5}

Heres what im not quite sure about

Im just assuming that I multiply that -1 by the power inside the brackets but im not sure if thats right. Anyhow heres what i got

2^{2x-2}= 2^{-5}

I then eliminated the 2s so Im left with 2x-2 = -5.

doing that in my head I get x = -3/2

plugging that into the equation doesn't work unfortunately.

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# Homework Help: Tricky question involving laws of indices

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