Math, asked by karthik193, 1 year ago

the 15th term of the 21,16,11,6,1,-4,-9....is

Answers

Answered by Anonymous
2
Hola there,

A.P. = 21, 16, 11, 6, 1, -4, -9....

a = 21

d = 16 - 21 = -5

n = 15th

an = a + (n - 1)d

=> a15 = 21 + (15 - 1)(-5)

=> a15 = 21 + (14)(-5)

=> a15 = 21 - 70

=> a15 = -49. ...Ans

Hope this helps....:)
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