If common difference of an AP is -6 then find a16 - a12???
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Answered by
6
I think it is -24. U can check it before accepting it.
timmy:
I needed the steps..the answer is right!
a13 - a14 = -6,i.e., the common difference. Similarly, a16 - a12 = -6*4 = -24. Hope this will help you.
Thank you !!
don't mention timmy.
Answered by
17
a₁₆ = a + ( n₋1)d
= a+ ( 16₋1) -6
=a -90 ........ 1
a₁₂ = a + (12-1) -6
= a-66 .........2
sub 1 - 2⇒
= a -90-a+66
= -24
= a+ ( 16₋1) -6
=a -90 ........ 1
a₁₂ = a + (12-1) -6
= a-66 .........2
sub 1 - 2⇒
= a -90-a+66
= -24
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