Paula invests £4500 in a savings account
that pays n% simple interest per annum.
At the end of six years their is £5025 in
the account.
Find the value of n

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis