Question

25. Show that the sequence given by an =5n² -3 is not an AP​

Answer 1

Answer:

an = 5n^2-3

a1 = 5*1^2-3

=5*1-3

=5-3

=2

a2 = 5(2)^2-3

=5*4-3

=20-3

=17

a3 = 5(3)^2-3

=5*9-3

=45-3

=42

=As we can see the common difference them is not the same which clearly says that this is not an AP.

Step-by-step explanation:

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