exam
Maths Puzzle
Numerical Ability
solve for x
3x+2(4x-8)=17
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exam Other Question
If A is an nxn matrix, prove that
det(adjA)=(detA)^n-1.
I was working with the formula of A^-1 but I don't get anywhere!
Thanks in advance for the help!!
The difference between two positive numbers is 4. If twice the square of the larger number is added to three time the smaller, the sum is 53.