Let a =4 i +3 j and b =3 i -4 j +5 k . If c is a vector such that c .( a b )+25=0, c .( i + j + k )=4 and...

Question

Let a =4 i +3 j and b =3 i -4 j +5 k . If c is a vector such that c .( a b )+25=0, c .( i + j + k )=4 and projection of c on a is 1, then the projection of c on b equals

Accepted Answer

(B)

JEE Main 2023 Mathematics question

Solution