(a) 2/3,1/3
(b) 21,
3
(a) 2,8,5
The sum of three integers in AP is 15 and their product is 80. The integers are
(b) 8, 2,5
(c) 2,5,8
(d) 8.
Answers
Answered by
0
Answer:
the correct answer is b
Step-by-step explanation:
BCZ 8*2*5=16*5,80
Answered by
1
Answer:(c)2,5,8
Step-by-step explanation:let a1 a2 and a3 be the integers
ATQ:
a1+a2+a3=15
a+a+d+a+2d=15 (an=a+(n-1)d)
3a+3d=15
a+d=5
d=5-a .........eq(1)
a(a+d)(a+2d)=80
a^3+2a^2d+a^2d+2ad^2=80
a^3+3a^2d+2ad^2=80
a^3+3a^2(5-a)+2a(5-a)^2=80 (from eq (1)
a^3+15a^2-3a^3+2a(25+a^2-10a)=80
15a^2-2a^3+50a+2a^3-20a^2=80
50a-5a^2=80
10a-a^2=16
a^2-10a+16=0
a=8 of a=2
d=-3 or a=3
Required integers = 2,5,8
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