CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

If an denotes the nth term of the AP 3, 8, 13, 18, ... then what is the value of (a30a20)
 (a) 40   (b) 36  S(c) 50   (d) 56
 


Solution

Given first term is 3
And common difference is 5

and we know 

 a s space w e space k n o w a subscript n equals a plus left parenthesis n minus 1 right parenthesis d a subscript 30 minus a subscript 20 equals open square brackets a plus left parenthesis 30 minus 1 right parenthesis d close square brackets minus open square brackets a plus open parentheses 20 minus 1 close parentheses d close square brackets equals 29 d minus 19 d equals 10 d equals 10 d equals 10 x 5 equals 50
 

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
QuestionImage
QuestionImage
View More...


Same exercise questions
QuestionImage
QuestionImage
View More...



footer-image