dan964
what
isn't it it -1/6 not -1/18
isn't it it -1/6 not -1/18
Would you multiply the matrices?
Yes it is, my bad.isn't it it -1/6 not -1/18
You would use this matrix in the same method as how I did it the first time around.Would you multiply the matrices?
How do you get the -1/6 for the inverse?
He divided by the determinant of the matrix.How do you get the -1/6 for the inverse?
Thanks IntegrandHe divided by the determinant of the matrix.
Of course, since the original matrix is diagonal, you can invert it by simply inverting (taking the reciprocal of) each diagonal entry.
Do you understand why?Thanks Integrand
leave in exact form2^(1-x) = 18
How would you solve this equation in a tech-free exam?
6/10/17if you want the exact value of x;2^x = 7
How would you solve for x without a calculator using logarithms?
take the log of both sides to get log(2^x)=log(7)
now apply the rule log(a^b)=blog(a) on the LHS to get xlog(2)=log(7)
hence x=log(7)/log(2)
put this on the calc if you want an approximation
28/10/1710^x = 2
Would x = log(2)/log(10)?
Someone replied "yes"
Give a demonstration of how you would do it.2^(1-x) = 18
How would you solve this equation in a tech-free exam?
BumpThe probability that a student studies maths = 2/3
The probability that a student studies german = 3/10
The probability that a student studies maths and does not study german = 7/15
Find pr(a randomly chosen student does not study either maths or german)
P(m'u g') = p(m') + p(g') - p(m' and g') = 1/3 + 7/10 - 7/30
= 4/5
Is this correct?
If not, how would it be worked out?
Anyone?Bump
Confused with probability