Math, asked by Aleenasabukoshy, 1 year ago

Thé number 3^13 - 3^10 is divisible by


Aleenasabukoshy: Pls ans
Aleenasabukoshy: With steps required

Answers

Answered by Pankaj03
20

Answer:

3¹³-3¹⁰ is divisible by 3¹⁰ and 26

Explanation:

3¹³ - 3¹⁰

This can be written as:

3¹⁰ ₓ 3³ - 3¹⁰

Taking common 3¹⁰, we get

3¹⁰(3³ - 1)

= 3¹⁰ (27-1)

= 3¹⁰ × 26

Hence, 3¹⁰ and 26 are the factor of 3¹³-3¹⁰

∴ 3¹³-3¹⁰ is divisible by 3¹⁰ and 26

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Aleenasabukoshy: But the options are
Aleenasabukoshy: a)3,13,5 b)3,10 c)2,3,13, d)2,3,10
Pankaj03: Sorry yaar I don't know...
Answered by amitnrw
19

The number 3¹³ - 3¹⁰ is divisible by 2, 3 and 13​

Step-by-step explanation:

Complete Question :

The number 3¹³ - 3¹⁰ is divisible by

(a) 2 and 3

(c) 2, 3 and 10

(b) 3 and 10

(d) 2, 3 and 13​

3¹³  - 3¹⁰

= 3⁽¹⁰⁺³⁾ - 3¹⁰

= 3¹⁰ * 3³  - 3¹⁰

= 3¹⁰ ( 3³ - 1)

= 3¹⁰ ( 27 - 1)

= 3¹⁰ * 26

= 3¹⁰ * 2 *  13

only factors are 2  , 3 , 13

so not divisible by 10

The number 3¹³ - 3¹⁰ is divisible by 2, 3 and 13​

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