please fast for brainliat promise oues 15 and 17 in pic
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15. [(-3)⁻²]⁻¹
=[(-1/3)²]⁻¹
=(1/9)⁻¹
=9¹
=9
17.[(5⁻¹ x 3⁻¹)⁻¹÷6⁻¹]
=(1/5×1/3)⁻¹÷1/6
=1/15⁻¹÷1/6
=15÷1/6
=15×6
=90
=[(-1/3)²]⁻¹
=(1/9)⁻¹
=9¹
=9
17.[(5⁻¹ x 3⁻¹)⁻¹÷6⁻¹]
=(1/5×1/3)⁻¹÷1/6
=1/15⁻¹÷1/6
=15÷1/6
=15×6
=90
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