Question

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

Answer 1

Given that,
a * b = ab/a+b

First let's find out,

3 * -1 = 3 ( -1) / 3 +( -1) = -3/2

Now,

3 * ( 3 * -1 )

= 3 * ( -3/2 )

= 3 ( -3/2 ) / 3 + ( -3/2)

= -9/2 / ( 3/2 )

= -9/2 * 2/3

= -3 .

Hope helped!

Answer 2

Answer:

$3^{*}(3^{*}-1)=-3$

Step by step explanation:

The given condition is: $a^{*}b=\frac{ab}{a+b}$.

Now, using the same condition, we can find the vale of $3^{*}-1=\frac{(3)(-1)}{3-1}=-\frac{3}{2}$ and again the value of

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

$3^{*}(3^{*}-1)=-3$.