Question

Find 100 is a term of the A.P 25, 28, 31 or not
a. true
b. false
c. none of them above

Answer 1

Answer:

b). False

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Answer 2

Answer:

The answer will be true(option a).

Step-by-step explanation:

Given A.P;

25,28,31...

here, d = 28 - 25 = 3

let any term in this A.P., say al, be 100.

Equation for al will be given as;

al = a + d(n-1);

Thus, 100 = 25 + (3)(n-1);

75 = 3(n-1)

25 = n - 1;

n = 26.

Here, it can be seen that 100 is the 26th term of this A.P..

Thus, 100 is the term of A.P. 25, 28, 31....

That's all.