Question

please solve all these​

Answer 1

Step-by-step explanation:

= (4/5)^-3 × (4/5)^2 × (4/5)^3

= (4/5)^(-3+2+3)

= (4/5)^2

= (4²/5²)

= (16/25) ≈ or ≈ 4/5

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= (3/7)^-2 + (4/7)^-2

= (7/3)² + (7/4)²

= (49/9) + (49/16)

= 7/3 + 7/4

= (28 + 21)/12

= 49/12

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= (4^-1 × 3^-1) + 12^-1

= (1/4 × 1/3) + 1/12

= 1/12 + 1/12

= 2/12

= 1/6