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CBSE Class 12-science Answered

6, 7,
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Asked by fizzapanda | 06 Oct, 2020, 12:30: PM
answered-by-expert Expert Answer
TO solve the matrix equation [5 4 // 1 1] X = [1 -2 // 1 3]
Let space straight X equals open square brackets table row straight a straight b row straight c straight d end table close square brackets As space open square brackets table row 5 4 row 1 1 end table close square brackets open square brackets table row straight a straight b row straight c straight d end table close square brackets equals open square brackets table row 1 cell negative 2 end cell row 1 3 end table close square brackets rightwards double arrow space open square brackets table row cell 5 straight a plus 4 straight c end cell cell 5 straight b plus 4 straight d end cell row cell straight a plus straight c end cell cell straight b plus straight d end cell end table close square brackets equals open square brackets table row 1 cell negative 2 end cell row 1 3 end table close square brackets rightwards double arrow space 5 straight a plus 4 straight c equals 1 space... space left parenthesis straight i right parenthesis 5 straight b plus 4 straight d equals negative 2 space... space left parenthesis ii right parenthesis straight a plus straight c equals 1 space... space left parenthesis iii right parenthesis straight b plus straight d equals 3 space... space left parenthesis iv right parenthesis Solving space left parenthesis straight i right parenthesis space and space left parenthesis iii right parenthesis comma space we space get straight a equals negative 3 space and space straight c equals 4 Solving space left parenthesis ii right parenthesis space and space left parenthesis iv right parenthesis comma space we space get straight b equals negative 14 space and space straight d space equals space 17 Hence comma space straight X equals open square brackets table row cell negative 3 end cell cell negative 14 end cell row 4 17 end table close square brackets
Answered by Renu Varma | 07 Oct, 2020, 09:42: AM

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CBSE 12-science - Maths
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CBSE 12-science - Maths
Let  f (x) = x2  – 5 x + 6  and  A =            1 1 0 2 1 3 2 0 1  , then  f (A) is equal to : (A)                   5 4 4 1 1 10 1 1 3 (B)                   5 4 3 1 1 10 1 1 3 (C)                  5 4 3 0 1 10 0 1 3 (D)      
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If a=[ -2 4 5] and b=[1 3 -6] verify that (ab)'=b'a'?
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