The 7th
term and the 17th term of an A.P. are 24 and 54 respectively. Find the 12th term of
this A.P
fast and give me from 3 marks
Answers
Answered by
0
answer is in attachment
Attachments:
Answered by
2
Answer:
• T7=24 , T17= 54 then T12= ?
-> tn= a+(n-1)d ( formula )
a+ 6d= 24
a+16d= 54
________
10d= 30
d=30/10
d= 3
• put d=3 in any of this two,
a+ 6d= 24
a+ 6(3)= 24
a+18= 24
a=6
• now put a= 6 and d= 3 in this,
[ t12 = a+ 11d (• as per formula) ]
t12 = a+ 11d
= 6+11(3)
=6+33
= 39
-> and T12 = 39 is the answer.
if you are agree then mark me as a brilliant...!☺️
Attachments:
Similar questions