Find the value of `| [ d , b ] , [ c , a ] |`

If   ( a -5 )^2 + ( b - c )^2 + ( c - d )^2 + ( b + c + d - 9 )^2 = 0 , then find the value of ( a + b + c ) ( b + c + d ) is

Find the value of (a + b + c) - d , if the following are in proportion. a, 30, 40, 60

Find the value of (a + b + c) - d , if the following are in proportion. 72, 144, 24, d

Find the value of (a + b + c) - d , if the following are in proportion. 12, 48, c, 36

Find the value of (a + b + c) - d , if the following are in proportion. 10, b, 24, 60

Find the value of [-e ] is ( a ) -2 ( b ) -3 ( c ) -1 ( d ) 0

Find the values of a, b, c, and d from the following equation: [2a+b a-2b5c-d4c+3d]=[4-3 11 24]

Find the value of c+d if c-d=2,cd=63 .

"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

Find the value of a,b,c and d from equation : [(a-b,2a+c),(2a-b,3c+d)] = [(-1,5),(0,13)]