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Find Where 0 (Zero) is a Term of the A.P. 40, 37, 34, 31, ..... . - Mathematics

Answer in Brief

Find where 0 (zero) is a term of the A.P. 40, 37, 34, 31, ..... .

 
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Solution

Let a be the first term and d be the common difference.

We know that, nth term = an a + (n − 1)d

It is given that a = 40, d = −3 and an = 0

According to the question,

⇒ 0 = 40 + (n − 1)(−3)
⇒ 0 = 40 − 3n + 3
⇒ 3n = 43
⇒ n =  \[\frac{43}{3}\]        .... (1)
Here, n is the number of terms, so must be an integer.
Thus, there is no term where 0 (zero) is a term of the A.P. 40, 37, 34, 31, ..... .

 

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APPEARS IN

RD Sharma Class 10 Maths
Chapter 5 Arithmetic Progression
Exercise 5.4 | Q 45 | Page 26
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