Question

2. Find the 12th term from the end of the AP: 3,6,9... 60.
how are we getting d=-3!
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Answer 1

Step-by-step explanation:

from the last term so we get

a=60

d=-3(given)

n=12

an=?

an=a+(n-1)d

an=60+(12-1)-3

an=60+(11)-3

an=60-33

an=27

Answer 2

Answer:

27

Step-by-step explanation:

Given, a=last term =60

d=a2-a1=57-60=-3

n=12

a12=a+(n-1)d

=60+(12-1)-3

=60+11×-3

=60-33

=27ans