wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

8 terms are inserted between 5 and 43 so that the resulting sequence is an AP. The sum of the resulting AP is. [3 MARKS]

Open in App
Solution

Including the terms 5 and 43, the number of terms in the AP will be 10.

Now, the first term of the AP is 5 and the last term is 43. [1 Mark]

The sum of n terms of an AP is given by
Sn=n2(first term+last term) [1 mark]

Hence,
S20=102(5+43)=5(48)=240 [1 mark]

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon