Question

If $$70, 75, 80, 85$$ are the first four terms of an arithmetic progression, then the 10th term is ______.

विकल्प

• $$35$$

• $$25$$

• $$115$$

• $$105$$

Answer 1

If $$70, 75, 80, 85$$ are the first four terms of an arithmetic progression, then the 10th term is 115.

Explanation:

The common difference is $$5$$, hence $$\mathrm{T}_{10} = 70 + 9(5) = 115$$.