Question

11,8,5,2 in this a.p.which first term First will be negative

Answer 1

Answer:

5th term is the first negative term.

Step-by-step explanation:

Given that, 11, 8, 5, 2 ..... in AP

An = a + (n - 1) d

a = 11

d = 8 - 11 = -3

Lets assume, An = 0

Then,

0 = 11 + (n - 1) -3

-11 = -3n + 3

-11 - 3 = -3n

=> n = -14/-3

which is approximately equal to 4.66

Now, number of terms cannot be decimal.

And negative numbers < 0, We round off 4.66 next integer which is 5.

A5 = 11 + (5 - 1) -3

= 11 + (-12) = -1