2). а). 3,4a⁻⁸b¹⁰ * 5a⁵b⁻⁹ = 17a⁵⁻⁸b¹⁰⁻⁹ = 17a⁻³b = 17b/a³
b). (5x⁻⁴/2y⁻⁵)⁻² * 100x⁻⁵y⁶ = (2y⁻⁵/5x⁻⁴)² * 100x⁻⁵y⁶ =
= 4y⁻¹⁰/25x⁻⁸ * 100x⁻⁵y⁶ = 16x⁸/y¹⁰ * x⁻⁵y⁶ = 16x³y⁻⁴ = 16x³/y⁴
3). 4200 = 4,2*10³
0,0035 = 3,5*10⁻³
51,1*10⁻² = 5,11*10⁻¹
0,24*10⁵ = 2,4*10⁴