Question

the 4th term of an A.P. is zero .Prove that the 25th term of the A.P. is tree times its 11th term

Answer 1

Answer:

Step-by-step explanation:

Answer 2

a=first term

d=COMMON difference

So 4th term=a+3d

0=a+3d

a= -3d

now

25th term =a+24d

=-3d+24d

=21d

now 11th term = a +10d

=10d-3d

=7d

so 11th term =7

11th term =21/3

3(11th term)=21

but 21=25th term

so 3(11th term)=25th term

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