Question

if ab+bc+ca=4 and abc =2 then find the value of 1/a+1/b+1/c​

Answer 1

Answer:

2

Step-by-step explanation:

multiply and divide by abc

Answer 2

Answer:

Step-by-step explanation:

Here are the two equations

ab+bc+ca = 4 …(1)

abc = 2 … (2)

Divide the LHS of (1) by the LHS of (2) and divide the RHS of (1) by the RHS of (2) to get

ab/abc+bc/abc+ca/abc = 4/2

1/c + 1/a + 1/b = 2 and that is the answer.