Question

if in an ap a2+a7=29 and a5-a10=-15 then d=?​

Answer 1

Answer:

Ans is -3

Step-by-step explanation:

$t5 = a + 4d \\ t10 = a + 9d \\ t5 + t10 = 15 \\ a + 4d - a - 9d = 15 \\ - 5d = 15 \\ d = \frac{15}{ - 5} \\ d = - 3$