Indices  
Summary 
4p^{5} is a short way of writing 4 × p × p × p × p × 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, reciprocal 