Thursday, 22 January 2026

If A=[(1,3),(3,4)], B=[(-2,1),(-3,2)] and A²-5B²=5C. Find matrix C where C is a 2 by 2 matrix. [icse2017].



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If find x. 1/(9!) + 1/(10!) = x/(11!).

  Here n! is read as n factorial. It can be written as n(n-1)! or n(n-1)(n-1)!