6. Find all two-digit numbers which satisfy the following conditions. a) It is divisible by 9 b) It is an even number c) It is not divisible by 5 d) Two of its factors are co-prime manu multinles of 6 are there between 0 and 100? 7 LO
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Answer:
17/√7 is the 15th term of AP
Step-by-step explanation:
let an= 17/√7
a=3/√7
d=a2-a1
= 4/√7-3/√7
=1/√7
an= a+(n-1)d
\frac{17}{ \sqrt{7} } = \frac{3}{ \sqrt{7} } + (n - 1) \times \frac{1}{ \sqrt{7} }
7
17
=
7
3
+(n−1)×
7
1
\frac{17}{ \sqrt{7} } = \frac{3}{ \sqrt{7} } + \frac{n}{ \sqrt{7} } - \frac{1}{ \sqrt{7} }
7
17
=
7
3
+
7
n
−
7
1
\frac{17}{ \sqrt{7} } = \frac{2}{ \sqrt{7} } + \frac{n}{ \sqrt{7} }
7
17
=
7
2
+
7
n
\frac{17}{ \sqrt{7} } - \frac{2}{ \sqrt{7} } = \frac{n}{7}
7
17
−
7
2
=
7
n
\frac{15}{ \sqrt{7} } = \frac{n}{ \sqrt{7} }
7
15
=
7
n
\frac{15}{ \sqrt{7} } \times \sqrt{7} = n
7
15
×
7
=n
n = 15n=15
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