Question

Find the 6th term from the end of the A.P. 17,14,11.....,-40.

Answer 1

a=17=t1

t2= 14

d=t2 - t1

= 14 - 17

= -3

tn= -40

so first let's find n

tn = a+(n-1)d

-40=17+(n-1)(-3)

-40=17-3n+3

-40=20 - 3n

-3n= -60

n=20

so 20th term is (-40)

so 6th term from the end of the A.P. will be 14th term

so ,

t14=a+(n-1)d

=17+(13)(-3)

=17-39

= -22

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Answer 2

Answer:

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