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- Question 3 & 4 Exercise 4.3
- kistan. =====Question 3===== Find sum of all the numbers divisible by $5$ from $25$ to $350$. GOOD ====Solution==== The numbers divisible by $5$ from $25$ tò $350$ are\\ $$25,30... end{align} =====Question 4===== The sum of three numbers in an arithmetic sequence is $36$ and the sum of ... d them. ====Solution==== Let us suppose the three numbers are $a-d, a, a+d$\\. then by first condition the
- Question 5 & 6 Exercise 4.3
- shawar, Pakistan. =====Question 5===== Find four numbers in an arithmetic sequence, whose sum is $20$ and ... squares is $120$ . ====Solution==== Let the four numbers are\\ $$a-2 d, a-d, a+d, a+2 d,$$ $Condition-1$\\... d= \pm 1\end{align} When $a=5$ and $d=1$ then the numbers are\\ \begin{align} a-3d&=5-3=2, \\ a-d&=5-1=4, \... =5+3=8.\end{align} When $a=5$ and $d=-1$ then the numbers are\\ \begin{align}a-3 d&=5-3(-1)=8, \\ a-d&=5-(-
- Question 10 Exercise 4.4
- shawar, Pakistan. =====Question 10===== Find two numbers if the difference between them is $48$ and their ... their G.M by $18$ . ====Solution==== Let the two numbers be $a$ and $b$ \\ Condition-$1$\\ The difference ... 48\\ \Rightarrow a&=49\end{align}\\ Hence the two numbers are $a=49$ and $b=1$. ====Go To==== <text al
- Question 3 and 4 Exercise 4.2
- eshawar, Pakistan. =====Question 3===== Find the numbers of terms in arithmetic progression $6,9,12, \ldot
- Question 7 & 8 Exercise 4.5
- $n$ terms. =====Question 8===== The sum of three numbers in G.P is $38$, and their product is $1728$; find