Revision: Term - 2 >> Algebra Mathematics SSLC (English Medium) Class 7 Tamil Nadu Board of Secondary Education

Exponents: An exponent is a numerical notation that indicates the number of times a number is to be multiplied by itself. Exponent is also called as power or index. Example, 7⁵.

The terms that do not have the same literal coefficients are called unlike terms. 

For example:

6a, 6ab and 6ac are unlike terms. 

Terms having the same literal part (same variables with the same powers) are called like terms.

For example:

xy, 5xy, -4xy, etc. are like terms 

For any non-zero integer a, where m and n are whole numbers, a^m × aⁿ =a^{m + n}.

For any non-zero integer a, where m and n are whole numbers and m > n, a^m ÷ aⁿ = a^{m – n}.

If a is a non-zero rational number and m and n are integers, then (a^m)ⁿ = a^{m × n} = a^mn.

For any non-zero integer a, where m is any whole number, a^m × b^m = (ab)^m.

a^m ÷ b^m = `a^m/b^m = (a/b)^m`, where a, and b are any non-zero integers and m is a whole number.