Find the first term and common difference in the A.P. $1 + 2 + 3 + 4 +$ ........

First term

= 1

; Common difference

= 0

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First term

= 1

; Common difference

= 1

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First term

= 2

; Common difference

= 1

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First term

= 1

; Common difference

= 2

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Solution

The correct option is B First term $= 1$ ; Common difference $= 1$
Given series is $1 + 2 + 3 + 4 +$ ......
Here the first term is $1$ .
We know common difference $= a_{2} - a_{1}$
Here $a_{1} = 1, a_{2} = 2 a_{3} = 3, a_{4} = 4$
Thus common difference $= 2 - 1 = 3 - 2 = 1$

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Find the first term and common difference in the A.P. 1+2+3+4+ ........

The correct option is B First term =1; Common difference =1Given series is 1+2+3+4+ ......Here the first term is 1.We know common difference =a2−a1Here a1=1,a2=2a3=3,a4=4Thus common difference =2−1=3−2=1

Find the first term and common difference in the A.P. $1 + 2 + 3 + 4 +$ ........

The correct option is B First term $= 1$ ; Common difference $= 1$
Given series is $1 + 2 + 3 + 4 +$ ......
Here the first term is $1$ .
We know common difference $= a_{2} - a_{1}$
Here $a_{1} = 1, a_{2} = 2 a_{3} = 3, a_{4} = 4$
Thus common difference $= 2 - 1 = 3 - 2 = 1$