Indices  
Summary 
4p^{5} is a short way of writing 4 x p x p x p x p x p. the 4 is called the coefficient , the p is called the base or variable and the 5 is called the index, power or exponent. indices (plural of index) obey certain rules when they are being multiplied and divided. 
Key Skills 

Vocabulary 
indices, index, coefficient, base, variable, power, exponent 