What is the differentiation of y = √{x + √{x + √{x}}} ?
a) {1}/{4√{x}√{x + √{x + √{x}}}}
b) {1}/{2√{x + √{x + √{x}}}}
c) {1}/{2√{x}√{x + √{x + √{x}}}}
d) {1}/{2√{x}√{x + √{x}}}