If for an AP,d=5,then t18-t13=?
a)5 (b) 20 (c) 25 (d) 30
Answers
Answered by
8
Answer:
(c) 25
Step-by-step explanation:
Let, common difference = d = 5,
first term = a = a,
and, number of the term = n
Tn = a+(n-1)d
T18 = a+(18-1)5
T18 = a+(17)5
T18 = a+85
Tn = a+(n-1)d
T13 = a+(13-1)5
T13 = a+(12)5
T13 = a+60
T18 - T13
= (a+85)-(a+60)
= a+85-a-60
= 85-60
= 25
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Answered by
12
Answer:
answer is (c)25
Step-by-step explanation:
it is given that d=5
and we have to find t18 - t13
t18 - t13
=a+17d-(a+12d)
=a+17d-a-12d
=5d
=5×5
=25
so option c is correct
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