Compute:
[−13]4÷[−13]8×[−13]5\Big[-\dfrac{1}{3}\Big]^4 ÷ \Big[-\dfrac{1}{3}\Big]^8 \times \Big[-\dfrac{1}{3}\Big]^5[−31]4÷[−31]8×[−31]5
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[−13]4÷[−13]8×[−13]5=[−13]4−8+5=[−13]1=−13\Big[-\dfrac{1}{3}\Big]^4 ÷ \Big[-\dfrac{1}{3}\Big]^8 \times \Big[-\dfrac{1}{3}\Big]^5\\[1em] = \Big[-\dfrac{1}{3}\Big]^{4-8+5}\\[1em] = \Big[-\dfrac{1}{3}\Big]^1\\[1em] = -\dfrac{1}{3}[−31]4÷[−31]8×[−31]5=[−31]4−8+5=[−31]1=−31
[−13]4÷[−13]8×[−13]5=−13\Big[-\dfrac{1}{3}\Big]^4 ÷ \Big[-\dfrac{1}{3}\Big]^8 \times \Big[-\dfrac{1}{3}\Big]^5 = -\dfrac{1}{3}[−31]4÷[−31]8×[−31]5=−31
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