CBSE Class 10-Mathematics: Chapter –5 Arithmetic Progressions Part 12

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Question 21:

Find for the A.P

Answer:

Question 22:

Find the common difference and write the next two terms of the AP

Answer:

Hence, it is AP.

Question 23:

Show that sequence defined by is an AP.

Answer:

So

Hence, it is AP.

Question 24:

The first term of an AP is and common difference . Find its general term.

Answer:

Question 25:

How many terms are there in A.P?

Answer:

Question 26:

In an AP, the sum of first terms is . Find its 2nd term

Answer:

Put

Question 27:

Show that the progression is an AP

Answer:

And

And

Hence, it is an AP.