Question

Please solve question no. 18

Answer 1

Answer:

Step-by-step explanation:

10th term =a+9d and15th term =a +14d

Now at

10(a +9d) =15(a+14d)

10a +90d = 15a +210d

10a -15a = 210d - 90d =-5a =120d

a = 120/-5d=-24d (I)

25th term = a + 24d

-24d + 24d =0. ( From 1)

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Answer 2

hope it will help u.............