Question

which term of the series -3,-1,5,..is 53 ​

Answer 1

Answer:

-3,-1,5

a = -3

d = t²-t¹ = -1-(-3) = -1+3 = 2

t³-t² = 5+1 = 6

d = 6-2 = 4

tn = a+(n-1)d

53 = -3 +(n-1)4

53+3 = n-1 * 4

56/4 = n-1

14 = (n-1)

n = 14+1 = 15

Therefore,15th term of series is 53

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