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JuliaPV
@JuliaPV
August 2022
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Решите пожалуйста..№151 Все на фото
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m11m
151.
а) Аn=
n
2n+1
n=1 A1 =
1
=
1
2*1+1 3
n=2 A2=
2
=
2
= 0.4
2*2+1 5
n=3 A3 =
3
=
3
= 0.3
3*3+1 10
б) Bn =
3n
n+1
n=1 B1 =
3*1
= 3/2 = 1.5
1+1
n=2 B2 =
3*2
= 6/3 = 2
2+1
n=3 B3 =
3*3
= 9/4 = 2.25
3+1
в) Cn =
2n+1
n²+1
n=1 C1=
2*1+1
= 3/2 =1.5
1² +1
n=2 C2=
2*2+1
= 5/5 =1
2²+1
n=3 C3=
2*3+1
= 7/10 = 0.7
3²+1
г) Dn=
2^(n) +1
n² -3
n=1 D1=
2¹ +1
= 3/(-2) = -1.5
1²-3
n=2 D2=
2² +1
= 5/1 =5
2² -3
n=3 D3=
2³ +1
= 9/6 =1.5
3² -3
2 votes
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Answers & Comments
а) Аn= n
2n+1
n=1 A1 = 1 = 1
2*1+1 3
n=2 A2= 2 = 2 = 0.4
2*2+1 5
n=3 A3 = 3 = 3 = 0.3
3*3+1 10
б) Bn = 3n
n+1
n=1 B1 = 3*1 = 3/2 = 1.5
1+1
n=2 B2 = 3*2 = 6/3 = 2
2+1
n=3 B3 = 3*3 = 9/4 = 2.25
3+1
в) Cn = 2n+1
n²+1
n=1 C1= 2*1+1 = 3/2 =1.5
1² +1
n=2 C2= 2*2+1 = 5/5 =1
2²+1
n=3 C3= 2*3+1 = 7/10 = 0.7
3²+1
г) Dn= 2^(n) +1
n² -3
n=1 D1= 2¹ +1 = 3/(-2) = -1.5
1²-3
n=2 D2= 2² +1 = 5/1 =5
2² -3
n=3 D3= 2³ +1 = 9/6 =1.5
3² -3