Q4 of 42 Page 140

If

Solving left hand side:



⇒


Equating left hand side to right hand side:



⇒


⇒


⇒


More from this chapter

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2

Is 3 ! + 4 ! = 7 ! ?

 3

Compute

5

Evaluate ,when

(i) n = 6, r = 2


(ii) n = 9, r = 5

 1

How many 3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?