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# CBSE Free Doubts and Solutions

## pls solve it

Asked by nainaadityathakur 28th May 2024, 4:29 PM

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## If the HCF of the polynomials x² + px + q and x² + ax + b is x + 1, then their LCM is

Asked by nikhilupadhyay6a 28th May 2024, 2:51 PM

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## As we know that, r=r0n2Z whereas, r0= radius of 1st Bohr's orbit of hydrogen atom =0.529˚A For r=r0- n2Z=1 ⇒n2=Z.....(1) ∵ For n=2,Be+3, Z=4, which satisfies equation (1). Hence, n=2,Be+3 will have the same radius of 1st Bohr's orbit of a hydrogen atom how do we understand that n=2 be3+ will land upto 1s^1 so how n=2?

Asked by alnaasha2006 28th May 2024, 2:38 PM

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## I mole n

Asked by ajjubhaikhgg851205khgg 28th May 2024, 1:30 PM

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## Quick cash Loan app customer care helpline Number 7865835433=8432045006 call Now All Deleted payment call

Asked by rochikumari25 28th May 2024, 12:14 PM

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## [12/7 + \{(6/8 - 4/7) * of * 28/42\}] / [5/9 + 12/3 - 7/12]

Asked by joshinaveen654 28th May 2024, 11:20 AM

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## Evaluate (√4)-3 ?

Asked by krishnadevansh91 28th May 2024, 9:58 AM

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## (|||x-1|-2|-1|-2)(|x-2|) ≥0

Asked by aroracherish448 28th May 2024, 9:07 AM

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## find 2/5 x -3/7 - 1/14 - 3/7× 3/5

Asked by sachinrahangdale79 28th May 2024, 9:06 AM

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## what are the number between900and 1500 which are divisible by8,15and 20

Asked by 88dineshkumar 27th May 2024, 8:11 PM