11 Plus Powers and roots
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If any number is represented in the form of ab, then a is called exponent and b is called power.
ab = a raised to power b = a x a x a - - - - - b times i.e., a is written b times.
let us understand with one example,
4 x 4 x 4 x 4 x 4 x 4 = 46
37 = 3 x 3 x 3 x 3 x 3 x 3 x 3 = 2187
* a0 = 1
The root of a number :
The root of a number 'a' is a number, which, when multiplied by itself a given number of times, equals x.
Let us understand with examples,
The square root of 9 is 3 because '3' is multiplied twice the product is 9.
3 x 3 = 9
The square root of 9 is represented by
The cube root of 8 is 2 because '2' is multiplied thrice the product is 8.
2 x 2 x 2 = 8
The cube root of 8 is represented by
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