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A+B2i+3j+6k and A-B=6i+3j-k find the value of A.B |
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Answer» ow r u??❤️┏_________∞◆∞_________┓✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭┗_________∞◆∞_________┛A + B = 2i + 3j + 6k ------(1)A - B = 6i + 3j - k -------(2)(1) + (2) => 2A = 8i + 6j + 5k A = 4i + 3j + 5/2 k Substituting this value in (1),4i + 3j + 5/2 k + B = 2i + 3j + kB = -2i + 0j - 3/2 k = -2i - 3/2 kA·B = (4i + 3j + 5/2 k )(-2i + 0j - 3/2 k) = -8 + 0 - 15/4 = -(32 + 15)/4 = -47/4┏_________∞◆∞_________┓✭Hòpè Ìt Hèĺp§✭Fòĺĺòw @zahaansajidPls mark as brainliest✭Follow me and I'll follow you BACK ✭┗_________∞◆∞_________┛ |
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