Chapter 4 principle of mathematical induction Questions and Answers: NCERT Solutions for Class 11th Maths

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Class 11 Maths Chapter 4: principle of mathematical induction - Questions and Answers of NCERT Book Solutions





Ans: Let us denote the given equality by P(n), i.e.,
Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




2. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e.
(k+1)2(k+1+1)2/4
((k+1)(k+1+1)/2)2
Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




3. Prove the following by using the principle of mathematical induction for all n∈N :



Ans: Let us denote the given equality by P(n), i.e.,
Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




4. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e.,




5. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




6. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




7. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




8. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction




9. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




10. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




11. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




12. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




13. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




14. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




15. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e.,




16. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




17. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: For n=1, Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




18. Prove the following by using the principle of mathematical induction for all n∈N:



Ans: Let us denote the given equality by P(n), i.e., Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




19. Prove that following by using the principle of mathematical induction for all n∈N: n(n+1)(n+5)is a multiple of 3.



Ans: Let us denote the given statement by P(n), i.e., Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




20. Prove that following by using the principle of mathematical induction for all n∈N:
102n-1+1 is divisible by 11



Ans: Let us denote the given statement by P(n), i.e.,

Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




21. Prove that following by using the principle of mathematical induction for all n∈N:
x2n-y2n is divisible by x+y.



Ans: Let us denote the given statement by P(n), i.e.,

Therefore, P(k+1) holds whenever P(k) holds. Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




22. Prove that following by using the principle of mathematical induction for all n∈N:
32n+2-8n-9 is divisible by 8.



Ans: Let us denote the given statement by P(n), i.e.,

Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.




23. Prove that following by using the principle of mathematical induction for all n∈N:
41n-14n is a multiple of 27.



Ans: Let us denote the given statement by P(n), i.e.,

Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.



24. Prove that following by using the principle of mathematical induction for all n∈N:
(2n+7)(n+3)2



Ans: Let us denote the given statement by P(n), i.e.,

Hence, the given equality is true for all natural numbers i.e., N by the principle of mathematical induction.






Last Updated on: Mar 26, 2024