Question

14th term of an ap 10-15-20
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Answer 1

Answer:

14th term = 75.

Step-by-step explanation:

10,15,20

First term = 10 =a

Common Difference = 15-10=20-15=5

We know nth term = a+(n-1)* d

so, 14 th term = 10+(14-1)*5

= 10 + 13*5

= 10+65

= 75

Hence, 14th term = 75.

Answer 2

Answer:

Step-by-step explanation:

Given A.P. is 10, 15, 20

1st term of an A. P.= t1 = 10

Common difference = d = t2 - t1 = 15 - 10 = 5

14th term of an A. P.

t14 = a + 13d = 10 + 13 × 5 = 10 + 65 = 75 is the answer.