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- Question 1 and 2, Exercise 4.8
- abad, Pakistan. =====Question 1===== Using the method of difference, find the sum of the series: $3+7+1... +5)$. GOOD m( =====Question 2===== Using the method of difference, find the sum of the series: $1+4+1
- Question 3 and 4, Exercise 4.8
- mabad, Pakistan. =====Question 3===== Using the method of difference, find the sum of the series: $1+4+1... +1}-3-2n) \). =====Question 4===== Using the method of difference, find the sum of the series: $1+2+4
- Question 5 and 6, Exercise 4.8
- abad, Pakistan. =====Question 5===== Using the method of difference, find the sum of the series: $3+4+6... + 2n \). GOOD =====Question 6===== Using the method of difference, find the sum of the series: $1+4+8
- Question 1 and 2, Exercise 4.4
- en sequence is not geometric. GOOD **Alternative Method** Given sequence is $5, 20, 100, 500, \ldots $.\
- Question 30, Exercise 4.4
- se $81$ inch after five days. GOOD **Alternative Method:** Take $a_1=1$ and $r=3$. Then rise in river