If `|x3 6 3 6x6x3|=|2x7x7 2 7 2x|=|4 5x5x4x4 5|=0,t h e n^(prime)x^(prime)i se q u a lto` 0 (b) `-9` (c) 3 (d) none of these

det[[x,3,63,6,x6,x,3]]=det[[2,x,7x,7,27,2,x]]=det[[4,5,x5,x,4x,4,5]]=0, then'x'is equal to

If |{:(x,3,6),(3,6,x),(6,x,3):}|=|{:(2,x,7),(x,7,2),(7,2,x):}|=|{:(4,5,x),(5,x,4),(x,4,5):}|=0 then x is equal to

If det[[x,3,63,6,x6,x,3]]=det[[2,x,7x,7,27,2,x]]=det[[4,5,x5,x,4x,4,5]]=0

If 3x-5y=5 and (x)/(x+y)=(5)/(7), then what is the value of 2xy is (a) 3(b)4(c)6(d)9(e) None of these

The image of plane 2x-y+z=2 in the plane mirror x+2y-z=3 is (a) x+7y-4x+5=0 (b) 3x+4y-5z+9=0( c) 7x-y+2z-9=0 (d) None of these

If (x)=|x^2+4x-3 2x+4 13 2x^2+5x-9 4x+5 26 8x^2-6x+1 16 x-6 104|=a x^3+b x^2+c x+d , then a=3 b. b=0 c.c=0 d. none of these

" if " |{:(x,,3,,6),(3,,6,,x),(6,,x,,3):}|= |{:(2,,x,,7),(x,,7,,2),(7,,2,,x):}|=|{:(4,,5,,x),(5,,x,,4),(x,,4,,5):}|=0 then x is equal to

Let a= cos((2pi)/7)+i sin((2pi)/7), A=a+a^2+a^4 and B=a^3+a^5+a^6, then A and B are the roots of the equation (A) x^2-x+2=0 (B) x^2-x-2=0 (C) x^2+x+2=0 (D) none of these