Calcula: t15 + t25 Si se sabe que: 26; 31; 36; 41; ...

242

Step-by-step explanation:

Here, we want to calculate t15 + t25

Mathematically, nth term is

a + (n-1) d

here, a = 26 and d = 31-26 = 5

t15 = 26 + (15-1) 5

t15 = 26 + 70

t15 = 96

t25 = 26 + (25-1) 5

t25 = 26 + 120

t25 = 146

t15 + t25 = 96 + 146 = 242