Question

please tell how to solve all these with method

Answer 1

Answer:

Step-by-step explanation:

AP

1,2,3,4,5,6

A=1 D=A2-A1

        =2-1

       =1

N=3 AN=?

[2] AN=A+[N-1]D

=1+[3-1]1

=1+[2]1

=1+[2]

=1+2

=3

[1] AN=A+[N-1]D

3=1+[N-1]1

3-1=1[N-1]

2=1[N-1]

2/1=N-1

2=N-1

N=2+1

N=3

[3] AN=A+[N-1]D

3=A+[3-1]1

3=A+[2]1

3=A+[2]

3=A+2

A=3-2

A=1

@SNEHASINGH

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@KENDRIYA VIDYALAYA NO.1 INDORE

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