# Product rule

Practice applying the product rule.
You might need: Calculator

### Problem

• Let g be a function such that g, left parenthesis, 9, right parenthesis, equals, 0 and g, prime, left parenthesis, 9, right parenthesis, equals, 2.
• Let h be the function h, left parenthesis, x, right parenthesis, equals, square root of, x, end square root.
Evaluate start fraction, d, divided by, d, x, end fraction, open bracket, g, left parenthesis, x, right parenthesis, dot, h, left parenthesis, x, right parenthesis, close bracket at x, equals, 9.