500182 ≈500000 вот и всё=).................
0,019
а вы уверены, что это 1-4 класс?
1/8+(x-1/8x)*2/7
1/8+7х/8*2/8
1/8+х/4
30⁴/₅<span> - 1</span>²/₅ ×(1⁴/₅ <span>× (12</span>⁷/₁₂ - 9¹⁹/₃₆<span>)) - </span>¹⁷/₃₅ × 1¹¹/₃₄ <span>= 21</span>⁵³/₇₀<span>
1)</span>12⁷/₁₂ - 9¹⁹/₃₆ = ¹⁵¹/₁₂ - ³³³/₃₆ = ¹⁵¹ˣ³/₃₆ - ³³³/₃₆ = ⁴⁵³⁻³³³/₃₆ = ¹²⁰/₃₆ = ¹⁰/₃<span>
2) 1</span>⁴/₅ × ¹⁰/₃ = ⁹/₅ × ¹⁰/₃ = ⁹ˣ¹⁰/₅ₓ₃ = ³ˣ²/₁ₓ₁ = ⁶/₁ <span>
3) 1</span>²/₅ × ⁶/₁ = ⁷/₅ × ⁶/₁ = ⁷ˣ⁶/₅ = ⁴²/₅ = 8²/₅<span>
4) 30</span>⁴/₅ - 8²/₅ = 22⁴⁻²/₅ = 22²/₅<span>
5) </span>¹⁷/₃₅ × 1¹¹/₃₄ = ¹⁷/₃₅ × ⁴⁵/₃₄ = ¹⁷ˣ⁴⁵/₃₅ₓ₃₄ = ⁴⁵/₃₅ₓ₂ = ⁹/₇ₓ₂ = ⁹/₁₄<span>
6) 22</span>²/₅ - ⁹/₁₄ = ¹¹²/₅ - ⁹/₁₄ = ¹¹²ˣ¹⁴/₇₀ - ⁹ˣ⁵/₇₀ = ¹⁵⁶⁸/₇₀ - ⁴⁵/₇₀ = ¹⁵²³/₇₀ = 21⁵³/₇₀
2^x=a
2a²-5a+2≥0
D=25-16=9
a1=(5-3)/4=1/2
a2=(5+3)/4=2
a≤1/2⇒2^x≤1/2⇒x≤-1
a≥2⇒2^x≥2⇒x≥1
x∈(-∞;-1] U [2;∞)