Question

Find the value of: ​

Answer 1

Answer:

(3^-7 ÷ 3^-10) × 3^-5

=(3^-7 × 3^10)×3^-5

=(3^(-7+10)×3^-5

=3^3×3^-5

=3^(3-5)

=3^-2

=1/3^2

=1/9

Answer 2

Answer:

[3^-7\3^-10]*3^-5

[3^-7-{-10}]*3^-5

[3^-7+10]*3^-5

3^3 *3^-5

3^[3+{-5}]

3^-2

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