Question

Find the nth term of the ap -40,-15,10 ,35...

Answer 1

Step-by-step explanation:

Given ---> An ap -40 ,-15,10,35..........

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To find---> nth term of ap

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Solution----> Formula of nth term of ap is

------------- aₙ=a+(n-1)d

Where aₙ=nth term , a=first term,n=number of term, d=common difference

Now given ap is

-40,-15,10,35,.............

a=-40 , d=-15-(-40) ,n=n

=-15+40

=25

Now aₙ=a+(n-1)d

=-40+(n-1)(25)

=-40+25n-25

=25n-65

Additional information--->

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1) Sₙ=n/2{2a+(n-1)d}

2) Sₙ=n/2(a+l)