The sum of two numbers is 4 less than twice the larger. if the larger is deecreased by three times the smaller, the reesult is -20. find the numbers

Find the gradient of f(x, y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol