Question

find out whether of the given sequence is an arithmetic progression. if it is arithmetic progression. find out the common difference is 12,2, - 8 ,- 18​

Answer 1

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▪︎ 12, 2, -8, -18.

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$\implies \: common (d)\: \: difference \\ \\ = a \frac{}{2} - a \frac{}{1}.$

${\huge{\blue{\bold{\underline{Now, }}}}}$

☆ Here,

=》 Difference between second and third term,

= 2-12

= -10.

=》 Difference between the third and second term,

= -8 (-2)

= -10.

☆ So here d is same Therefore the seq. is in AP

with d = -10.

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