If `a*b=(a b)/(a+b)` , find the value of `3*(3*-1)` . `-3` (b) `-1. 5` (c) `-1` (d) `2/3`

If a*b=(ab)/(a+b), find the value of 3*(3*-1)*-3(b)-1.5(c)-1(d)(2)/(3)

If a:b=3:1 and b:c=5:1 , then find the value of ((a^3)/(15b^2c))^3

Find the value of ( 3/5 )^0 is ( a ) 5/3 ( b ) 3/5 ( c ) 1 ( d ) 0

If a-b=1, then the value of a^(3)-b^(3)-3ab will be -3(b)-1(c)1(d)3

if a=3,b=0,c=2 and d=1 ,find the vale 3a+3b-6c+4d

If (a/3-1,\ b-2/3)=(5/3,1/3) , find the values of a\ a n d\ bdot

"If A"= ({:(2, 3),(5, 1):}), B = ({:(a, b),(c, d):}) and AB = -13I, then find the value of a + b - c + d. (a) 5 (b) 3 (c) 2 (d) 1