Q5 of 140 Page 267

Write the following products in factorial notation:

(i) 6 × 7 × 8 × 9 × 10 × 11 × 12


(ii) 3 × 6 × 9 × 12 × 15


(i) Formula :


Let ,



Multiplying and dividing by



From the above formula,



Conclusion :



(ii) Formula :


Let ,



Above equation can be written as




By using above formula,



Conclusion :



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