Dada a progressão com três termos:
PG: (a, b, c)
Sabendo que a + b + c = 35 e abc = 1000, qual será a equação do segundo grau em que suas raízes serão iguais a razão q desta PG?
A
q2 + q + 5 = 0
B
10q2 + 20q + 30 = 0
C
10q2 − 25q + 10 = 0
D
18q2 + 25q − 20 = 0
E
45q2 + 12q − 80 = 0
Answers
Answered by
1
Answer:
?????????????????????????
Answered by
5
10q^2 − 25q + 10 = 0
Step-by-step explanation:
we need to find quadratic equation whose roots are ratio of gp formed by a b c.
a + b + c = 35
abc = 1000
a = 20
b = 10
c = 5
20 , 10 , 5 r = 1/2
5 , 10, 20 , r = 2
10q^2 − 25q + 10 = 0
10q^2 - 20q - 5q + 10 = 0
10q(q-2) -5(q-2) = 0
q = 1/2 or 2
Similar questions