Question

a = 2i + 2j , b = 2j + 2k find a.b​

Answer 1

$[tex]\huge{\bf{\underline{\underline{\pink{ANSWER}}}}}$[tex]

Given a=2i +2j , b= 2j + 2k

TO FIND:- ab

proof:-

--》 2i+2j×2j+2k

--》 2 {I + j ×j +k}

--》2 {I +j^2 + k}

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Answer 2

Answer:

1. (2i+2j)(2j+2k)
2. 2i (2j+2k)+2j (2j+2k)
3. 4ij+4ik+4j^2+4jk