Question

(ab x (a+b)))/(1/a+1/b) = ? If a = 1 b = 2​

Answer 1

Answer:

4

Step-by-step explanation:

substituting a=1 ,b=2

(1×2×(1+2))/(1/1+1/2)

(2×3)/(1+1/2)

(6)/3/2

6÷3/2

6×2/3

2×2

=4