Question

यदि किसी समांतर श्रेणी के प्रथम m पदो का योगफल (a*m*m+b*m) है, तब सार्व अंतर क्या होगा

Answer 1

I understand this question but one doubt , sarb means what please say me then I will be answer this question .

Answer 2

Step-by-step explanation:

Sm = am² + bm

m/2 { 2a + (m - 1)d } = am² + bm

m/2 { 2a + (m - 1)d } = m(am + b)

1/2 { 2a + (m - 1)d } = am + b

2a + (m - 1)d = 2am + 2b

(m - 1)d = 2am - 2a + 2b

(m - 1)d = 2a(m - 1) + 2b

d = 2a + 2b/(m - 1)

d = 2a(m - 1) + 2b / (m - 1)

सार्व अंतर (d) = 2 { am + (b - a) } / (m - 1)