Jawaban:
jawaban yang B
maaf klo salah
Penjelasan dengan langkah-langkah:
jadikan jawaban terbaik pls
U9-U6=18
U12 = 72
a. Nilai Kedua suku yaitu U9 dan U6 = ...
b. S25 = ...
a. (a+8b)-(a+5b)=18
(a-a+8b-5b)=18
(3b)=18
(b)=18/3
(b)=6
U12 = a+11b
72 = a+11(6)
72 = a + 66
a = 72-66
a = 6
a. U9 = a+8b
= 6+8(6)
= 6+48
= 54
U6 = a+5b
= 6+5(6)
= 6+30
= 36
b. S25 = n/2(a+Un)
= 25/2(a+U25)
= 25/2(6+150)
= 25/2(156)
= 25(78)
= 1.950
U25=a+24b
=6+24(6)
=6+144
=150
Demikian
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Jawaban:
jawaban yang B
maaf klo salah
Penjelasan dengan langkah-langkah:
jadikan jawaban terbaik pls
Verified answer
Jawaban:
Deret dan Barisan Aritmatika
Penjelasan dengan langkah-langkah:
U9-U6=18
U12 = 72
a. Nilai Kedua suku yaitu U9 dan U6 = ...
b. S25 = ...
a. (a+8b)-(a+5b)=18
(a-a+8b-5b)=18
(3b)=18
(b)=18/3
(b)=6
U12 = a+11b
72 = a+11(6)
72 = a + 66
a = 72-66
a = 6
a. U9 = a+8b
= 6+8(6)
= 6+48
= 54
U6 = a+5b
= 6+5(6)
= 6+30
= 36
b. S25 = n/2(a+Un)
= 25/2(a+U25)
= 25/2(6+150)
= 25/2(156)
= 25(78)
= 1.950
U25=a+24b
=6+24(6)
=6+144
=150
Demikian