15. If (a + b)(b + c)(c + a) = 6.7.8 and a + b +
C = 14 then c = ?
(a) 2
(b) 6
(c) 1
(d) 3
2
Answers
Answered by
1
Answer:
(a+b)=6k
(b+c)=7k
(c+a)=8k
Now, we get addition of LHS & RHS
2a+2b+2c=21k
2(a+b+c)=21k
2(14)=21k —————- [given - (a+b+c)=14]
28=21k
k=28/21=4/3 ———————(1)
Since,
a+b+c=14
c=14-(a+b)
we have,
a+b=6k
a+b=6(4/3) ——————-from 1
a+b=8
now,
c=14-(a+b)
c=14–8
c=6
Answered by
0
Answer:
6isright answer
I hope hlep you
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