Question

for the finite AP 40,35,30,.,-200, find the 10th term from the end.

Answer 1

Given

a=40

d=35-40=-5

Let n be the number of terms

a+(n-1)d=-200

40-5n+5=-200

-5n=-245

=n=-245/-5

=n=49

10th term from the end is the 40th term .

a+39d

=40+39*-5

=40-195

=-155

Hope it helps.

Answer 2

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