Question

a*b = ab/a+b find the value of 3*(3*-1) competitiveguide

Answer 1

a*b=ab/(a+b)
3*(-1)=3×(-1)/{3+(-1)}= -3/2
3*(3*[-1])=3*(-3/2)=3×(-3/2)/{3+(-3/2)}=(-9/2)/{3/2}=-9/3=-3

Answer 2

Answer:

The value is $3*(3*(-1))=-3$

Step-by-step explanation:

Given : $a*b=\frac{ab}{a+b}$

To find : The value of $3*(3*(-1))$ ?

Solution :

Expression $3*(3*(-1))$

Applying given situation in bracket, $a*b=\frac{ab}{a+b}$

$3*(-1)=\frac{3(-1)}{3+(-1)}$

$3*(-1)=\frac{-3}{2}$

Substitute,

$3*(3*(-1))=3*(\frac{-3}{2})$

$3*(3*(-1))=\frac{3(\frac{-3}{2})}{3+(\frac{-3}{2})}$

$3*(3*(-1))=\frac{\frac{-9}{2}}{\frac{3}{2}}$

$3*(3*(-1))=\frac{-9\times 2}{2\times 3}$

$3*(3*(-1))=-3$

Therefore, The value is $3*(3*(-1))=-3$