Question

divide 21 into three parts that are in ap whose product is 168​

Answer 1

Answer:2,7,12

Step-by-step explanation:

2+7+12=21

2*7*12=168

Answer 2

HEY MATE HERE'S YOUR ANSWER

Answer:

a=7 and d=5,-5

Step-by-step explanation:

let's the 3 terms of the AP be,

(a-d),a &(a+d)

now, its given that,

a1+a2+a3=21

=>(a-d)+a+(a+d)=21

=> 3a =21

=> a= 7

also,

a1×a2×a3=168

a×(a-d)×(a+d)=168

7×(49-d²)=168

49-d²=168/7=24

d²=49-24=25

d=5,(-5)

therefore the AP is:~

when d=5

2,7,12

when d=-5

12,7,2

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