(1-√ 5)²=1-2√5+5=6-2√5
<span>(√10 -2)²=(√10)²-4√10+4=10-4√10+4=14-4√10
(√ 3- √ 5)²=(√3)²-2·√3·√5+(√5)²=3-2√15+5=8-2√15
(√7+√ 2)²=(√7)²-2√7·√2+(√2)²=7-2√14+2=9-2√14
</span>
1) f ' (x)=14(x-5)¹³
f ' (4)=14(4-5)¹³= -14
2) f ' (x)=24(3x-11)⁷
f ' (4)=24(3*4-11)⁷=24
3) g ' (x)= -35(x-6)⁻⁶ = -35/(x-6)⁶
g ' (7)= -35/(7-6)⁶= -35
4) y ' (x)= -60(4x-9)⁻⁴= -60/(4x-9)⁴
y ' (2)= -60/(4*2-9)⁴= -60
1) (4⅓+3(1/5))÷113=(1/15)
1. 4⅓+3(1/5)=(13/3)+(16/5)=(13×5+16×3)/15=(65+48)/15=(113/15)
2. (113/15)÷113=(113/15)×(1/113)=(1/15)
2) (6-7⅛)×((2/9)+⅔)=(-1)
1. 6-7⅛=6-(57/6)=(6×8-57)/8=(48-57)/8=(-9/8)
2. (2/9)+⅔=(2+2×3)/9=(8/9)
3. (-9/8)×(8/9)=-1
3) 17÷(4⅓-3(1/5))=15
1. 4⅓-3(1/5)=(13/3)-(16/5)=(13×5-16×3)/15=(65-48)/15=17/15
2. 17÷(17/15)=17×15/17=15
4) (15-4⅛)×(3(14/15)-2(3/5))=14,5
1. 15-4⅛=15-(33/8)=(15×8-33)/8=(120-33)/8=(87/8)
2. 3(14/15)-2(3/5)=(59/15)-(13/5)=(59-13×3)/15=(59-39)/15=20/15
3. (87/8)×(20/15)=(87×4×5)/(2×4×3×5)=87/6=29/2=14½=14,5