Question

all the formulas of lesson arithmetic progression of class 10 ​

Answer 1

Step-by-step explanation:

d = a2 – a1 = a3 – a2 = ……. = an – an – 1

a, a + d, a + 2d, a + 3d, a + 4d, ………. ,a + (n – 1) d

an = a + (n − 1) × d

S = n/2[2a + (n − 1) × d]

S  = n/2 (first term + last term)

Hope this will help you