SSC CGL Model Paper 7

Question : 61 of 100

Marks: +1, -0

If ab + bc + ca = abc, then find value of

Solution:

Given,
ab +bc +ac = abc .....(i)
Now,

{a+b}/{a b ( c -1)}+{b + c}/{b c ( a -1)}+{c+a}/{c a ( b - 1)}

{a+b}/{bc+ac }+{b + c}/{ab+ac }+{c+a}/{ab + bc}

{a+b}/{c(b +a ) }+{b + c}/{a( b+ c )}+{c+a}/{b(a + c)}

=1/a+1/b+1/c={bc+ab+ac}/{abc}

{abc}/{abc}=1

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