which term of the A.P 3 , 10 , 17 ........ will be 84 more than its 13th term?☺
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Step-by-step explanation:
Which term of the ap 3,10,17 will be 84 more than its 13th term?
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asked Nov 7, 2017 in Class X Maths by aditya23 (-2,152 points)
Which term of the ap 3,10,17 will be 84 more than its 13th term?
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answered Nov 7, 2017 by akansha Expert (2.2k points)
Given A.P. is 3, 10, 17....
Here, a = 3
d = 10 – 3 = 7
Let the term which is 84 more than its 13th term be am.
Thus, the required term is 25th term of the given A.P.
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Answer:
Let the term which is 84 more than its 13th term be am. Thus, the required term is 25th term of the given A.P.
Step-by-step explanation:
am=a13+84
=87+84
=171
again by substituting in
Sn=a+(n-1)d
we get
n=25
Hope it is usefull
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