Question

0.14 which term of the AP: 4,7, 10, .......is less than its 100th term?

05. Find the sum of odd numbers between 100 and 200

0:16. The number 2x + 3,5,7 are in AP, then x equal to.......​

Answer 1

14 a=5 and a+99d= -292

5+99d=-292

99d= -292-5 = -297

d = 3 therefore ap is 5,8,11, ......

5 200- 100 = 100

sum of odd natural no = (ending no)^2

(100)^2 = 10000

16 Answer:

2115

Step-by-step explanation:

AP : 3,5,7,....,91

First term = a = 3

Common difference = 5-3 = 7-5 = 2

Formula of nth term = a_n=a+(n-1)d

91=3+(n-1)2

88=(n-1)2

44=(n-1)

n = 45

Sum of first n terms = S_n=\frac{n}{2}(2a+(n-1)d) So

S_{45}=\frac{45}{2}(2(3)+(45-1)(2))

S_{45}=2115

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Answer 2

Answer:

q14: 99th term

q5: 7200