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CBSE Class 12-science Answered

Determinants
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Asked by alanpeter9611 | 15 Feb, 2019, 06:18: PM
answered-by-expert Expert Answer
begin mathsize 12px style D space equals space open vertical bar table row 1 a cell a squared end cell row cell a squared end cell 1 a row a cell a squared end cell 1 end table close vertical bar space
b y space d o i n g space left parenthesis R subscript 2 minus a squared R subscript 1 right parenthesis space space comma space i. e space m u l t i p l y i n g space f i r s t space r o w space b y space a squared space a n d space a f t e r space s u b t r a c t i n g space f r o m space s e c o n d space r o w comma
space D space equals space open vertical bar table row 1 a cell a squared end cell row 0 cell 1 minus a cubed end cell cell a minus a to the power of 4 end cell row a cell a squared end cell 1 end table close vertical bar
S i m i l a r l y space b y space d o i n g space left parenthesis R subscript 3 minus a R subscript 1 right parenthesis
D space equals space open vertical bar table row 1 a cell a squared end cell row 0 cell 1 minus a cubed end cell cell a minus a to the power of 4 end cell row 0 0 cell 1 minus a cubed end cell end table close vertical bar space equals space open parentheses 1 space minus space a cubed close parentheses squared
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Answered by Thiyagarajan K | 16 Feb, 2019, 04:04: PM
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