Suppose 3 people each called 3 friends on the phone.
Then.,each of the friends called 3 other friends
Then each of those friends called 3 other friends.
Then, each of those friends called 3other friends.

Write a calculation using powers that you could use to figure out to how many people were called together

Answer this question! 30 points and brainliest! only if you know the answer.

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).

Pls yall i really need the answer fr fr