`sqrt(42+sqrt(42+sqrt(42+....)))=`

sqrt (2xxsqrt(2xxsqrt(2xxsqrt(2xx2^(42)))))

If the image of the point P(1,-2,3) in the plane, 2x+3y-4z+22=0 measured parallel to the line, x/1=y/4=z/5 is Q , then P Q is equal to : sqrt(42) (2) 6sqrt(5) (3) 3sqrt(5) (4) 3sqrt(42)

If the image of the point P(1,-2,3) in the plane, 2x+3y-4z+22=0 measured parallel to the line, x/1-y/4-z/5 is Q , then P Q is equal to : sqrt(42) (2) 6sqrt(5) (3) 3sqrt(5) (4) 2sqrt(42)

If the image of the point P(1,-2,3) in the plane, 2x+3y-4z+22=0 measured parallel to the line, x/1=y/4=z/5 is Q , then P Q is equal to : sqrt(42) (2) 6sqrt(5) (3) 3sqrt(5) (4) 3sqrt(42)

a=3(sqrt(8+2sqrt(7))-sqrt(8-2sqrt(7))),b=sqrt(((42)(30)+(36))) then the value of log _(a)b is equal to

7,sqrt(42),6

sqrt((42 - 6)(20 + 16)) =

If the image of the point P(1,-2,3) in the plane,2x+3y-4z+22=0 measured parallel to the line,(x)/(1)-(y)/(4)-(z)/(5) is Q, then PQ is equal to : sqrt(42) (2) 6sqrt(5)(3)3sqrt(5)(4)3sqrt(42)