Question

How manyterms are there in A.p?18,151/2,13......-47

Answer 1

answer is 27.........................

Answer 2

Answer:

27

Step-by-step explanation:

According to this question

We have been given that

Value of $a_n$ = - 47,  a = 18 and d = - 2.5

Formula,

$a_n$ = $a + (n - 1)\times d$

- 47 = $18 + (n - 1)\times (-2.5)$

- 47 - 18 = $(n - 1)\times (-2.5)$

- 65 =  $(n - 1)\times (-2.5)$

$\frac{- 65}{- 2.5}$ = n - 1

26 = n - 1

n = 27

Hence, 27 terms in this A.P series.