Question

Find the 9 term from the end of the AP 5,9,13,918
185
If x=2sine and y=2cos 8+1 then find the value of x+y.
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Answer 1

Here, nth term is=a+(n−1)d

=>5+(n−1)4=185

Hence, n=46

So, 9th term from end will be the 38th term of this A.P

i.e; a+37d=5+37.(4)

=>153

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