Question

9^9×9^8×9^7×9^6×9^5×9^4×9^3×9^2×9^1×9^0

Answer 1

9⁰ = 0

=> tích trên = 0

Answer 2

\(9^9*9^8*9^7*9^6*9^5*9^4*9^3*9^2*9^1*9^0=\)9^{9+8+7+6+5+4+3+2+1+0} = 9⁴⁵

Answer 3

9⁹×9⁸×9⁷×9⁶×9⁵×9⁴×9³×9²×9¹×9⁰

=(9⁹×9¹) × (9⁸×9²) × (9⁷×9³) × (9⁶×9⁴) ×9⁰

= 9¹⁰ × 9¹⁰ × 9¹⁰ × 9¹⁰ × 9⁰

= 9⁴⁰ × 9⁰

=0

Nhớ tick cho mình nha