Question

In an ap, t7= 25, common difference is 4 , find t15

Answer 1

Step-by-step explanation:

t7 = 25

d=4

t7=t+6d

25=t +6d

25=t +6×4

t=1

now

t15 = t+ 14d

t15= 1 + 14 ×4

t15 = 1+56

t15=57

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Answer 2

Answer:

t15 = 57

Step-by-step explanation:

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