Question

-10,-15,-20,-25 ka konsa paad -625 hoga

Answer 1

Answer:

a=-10

d=-15-(-10)

d=-5

an=-625

a+(n-1)d=-625

-10+(n-1)-5=-625

-20-5n+5=-625

-15-5n=-625

-5n=-610

$n = \frac{610}{5} \\ n = 122$

Answer 2

Step-by-step explanation:

given a=-10 d= -15-(-10) =-5

let tn=-625

we know that tn = a + (n-1)d

-625 = -10 +(n-1) -5

-625+10 = (n-1) -5

-615= (n-1) -5

(n-1) =-615/-5

(n -1) = 123

n = 123 +1

n = 124